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ISK Flazasulfuron Herbicide

HERBICIDE

A herbicide for weed control in Citrus, Grapes, Sugarcane, Tree Nuts, Conifer Trees and 

Industrial Vegetation Management.

ACTIVE INGREDIENT: By Wt.

Flazasulfuron*: ..................................................... 25.0%

OTHER INGREDIENTS:....................................... 75.0%

Total......................................................... 100.0%

* N-[[(4,6-dimethoxy-2-pyrimidinyl) amino]carbonyl]-3-(trifluoromethyl)-2-pyridinesulfonamide

Contains 0.25 pounds active ingredient per pound of formulated product.

KEEP OUT OF REACH OF CHILDREN

CAUTION

Si usted no entiende la etiqueta, busque a alguien para que se la explique a usted en detalle. (If 

you do not understand this label, find someone to explain it to you in detail.) 

SEE SIDE PANEL FOR FIRST AID AND ADDITIONAL PRECAUTIONARY STATEMENTS.

READ ENTIRE LABEL CAREFULLY AND USE ONLY AS DIRECTED.

EPA Reg. No. 71512-18

EPA Establishment No. 049036-JPN-001

Net Contents: 309 pounds (140 kilograms) ISK Biosciences Corporation

7470 Auburn Road, Suite A

Concord, Ohio 44077

GROUP B

(2) HERBICIDE
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PRECAUTIONARY STATEMENTS

HAZARDS TO HUMANS & DOMESTIC ANIMALS

CAUTION

Harmful if swallowed or absorbed through skin. Avoid contact with skin, eyes or clothing. Wash 

thoroughly with soap and water after handling. Remove and wash contaminated clothing before reuse. 

FIRST AID

If swallowed  Call a poison control center or doctor immediately for treatment advice.

 Have person sip a glass of water if able to swallow.

 Do not induce vomiting unless told to do so by the poison control center or doctor.

 Do not give anything by mouth to an unconscious person.

If on skin or

clothing

 Take off contaminated clothing.

 Rinse skin immediately with plenty of water for 15-20 minutes.

 Call a poison control center or doctor for treatment advice.

If in eyes  Hold eye open and rinse slowly and gently with water for 15-20 minutes.

 Remove contact lenses, if present, after the first 5 minutes, then continue rinsing eye.

 Call a poison control center or doctor for treatment advice.

If inhaled  Move person to fresh air.

 If person is not breathing, call 911 or an ambulance, then give artificial respiration, 

preferably by mouth-to-mouth, if possible. 

 Call a poison control center or doctor for further treatment advice.

Have the product container or label with you when calling a poison control center or doctor, or going for 

treatment.

HOT LINE NUMBER

For 24-Hour Medical Emergency Assistance call 1-888-484-7546.

[For Chemical Emergency, Spill, Leak, Fire or Accident, call CHEMTREC 1-800-424-9300.]

PERSONAL PROTECTIVE EQUIPMENT (PPE)

Applicators and other handlers must wear: long-sleeved shirt and long pants, shoes plus socks, 

protective eyewear and waterproof gloves. 

USER SAFETY REQUIREMENTS

Discard clothing and other absorbent materials that have been drenched or heavily contaminated with this 

product’s concentrate. Do not reuse them. Follow manufacturer’s instructions for cleaning/maintaining 

PPE. If no such instructions for washables exist, use detergent and hot water. Keep and wash PPE 

separately from other laundry.

USER SAFETY RECOMMENDATIONS

Users should:

Wash hands before eating, drinking, chewing gum, using tobacco or using the toilet. Remove 

clothing/PPE immediately if pesticide gets inside. Then wash thoroughly and put on clean clothing. 

Remove PPE immediately after handling this product. Wash the outside of gloves before removing. As 

soon as possible, wash thoroughly and change into clean clothing.

ENVIRONMENTAL HAZARDS

Do not apply directly to water, or to areas where surface water is present or to intertidal areas below the 

mean high water mark. Do not contaminate water when disposing of equipment wash water or rinsate.

This chemical has properties and characteristics associated with chemicals detected in ground water. 

This chemical may leach into ground water if used in areas where soils are permeable, particularly where 

the water table is shallow.
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This product may contaminate water through drift of spray in wind, or drift of soil from treated areas.

This product has a high potential for runoff for several weeks after application. Poorly drained soils and 

soils with shallow water tables are more prone to produce runoff that contains this product. Avoid 

applying this product to ditches, swales, and drainage ways. Runoff of this product would be reduced by

avoiding applications when rainfall is forecasted to occur within 48 hours.

There is potential for injury to sensitive plants irrigated with run-off water containing flazasulfuron.

DIRECTIONS FOR USE

It is a violation of Federal law to use this product in a manner inconsistent with its labeling. 

Do not apply this product in a way that will contact workers or other persons, either directly or through 

drift. Only protected handlers may be in the area during application. For any requirements specific to 

your State or Tribe, consult the agency responsible for pesticide regulation.

AGRICULTURAL USE REQUIREMENTS

Use this product only in accordance with its labeling and with the Worker Protection Standard, 40 CFR 

part 170. This Standard contains requirements for the protection of agricultural workers on farms, forests, 

nurseries, and greenhouses, and handlers of agricultural pesticides. It contains requirements for training, 

decontamination, notification, and emergency assistance. It also contains specific instructions and 

exceptions pertaining to the statements on this label about personal protective equipment (PPE) and 

restricted-entry interval. The requirements in this box only apply to uses of this product that are covered 

by the Worker Protection Standard. 

Do not enter or allow worker entry into treated areas during the Restricted Entry Interval (REI) of 12

hours. 

PPE required for early entry to treated areas that is permitted under the Worker Protection Standard and 

that involves contact with anything that has been treated, such as plants, soil, or water, is: Coveralls, 

chemical-resistant gloves made of any waterproof materials, and shoes plus socks.

Sod and seed farms are within the scope of the Worker Protection Standard.

NON-AGRICULTURAL USE REQUIREMENTS

The requirements in this box apply to uses of this product that are not within the scope of the Worker 

Protection Standard for agricultural pesticides, 40 CFR part 170. The WPS applies when this product is 

used to produce agricultural plants on farms, forests, nurseries, or greenhouses. Turf grasses on golf 

courses and other non-residential turf areas such as industrial parks, tank farms, professionally managed 

college and professional sports fields and commercial lawns are not within the scope of the Worker 

Protection Standard. Do not enter or allow others to enter the treated area until sprays have dried.
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USE INFORMATION

Flazasulfuron is a selective herbicide for preemergence and postemergence control of certain broadleaf 

weeds and grasses in citrus, grape, sugarcane, tree nuts, conifer trees and for use in industrial vegetation 

management in specified nonagricultural areas. 

Flazasulfuron is absorbed through the root and foliage of plants, rapidly inhibiting the growth of 

susceptible weeds. For preemergence application, rainfall or irrigation is needed for herbicide activation. 

Length of control is a function of environmental factors such as soil type, soil moisture, temperature and 

amount of moisture after the application. Existing weeds or crop residue may reduce the length and level 

of residual control. Weed control may also be reduced due to environmental stress to the weeds at the 

time of the application.

Weed growth stops within hours after the application, however symptom progress from discoloration or 

chlorosis to necrosis generally requires from 2 to 4 weeks. Speed of control is generally a function of

weather with faster action during warmer weather and actively growing weeds. The best control is 

obtained when ISK Flazasulfuron Herbicide is applied either to weeds just prior to germination or to 

young, actively growing weeds.

For optimal herbicidal activity, prior to application, the bed or soil surface should be reasonably even and 

clear of crop and weed residue. Before herbicide application, crop and weed residue can be mixed into 

the soil through cultivation, or removed by blowing the area to be treated. Any practices that cause 

disturbance of the soil surface after herbicide treatment will decrease herbicidal activity. If rainfall does 

not occur within 2 weeks after a preemergence, application 1⁄4 to 1⁄2 inch of irrigation water should be 

applied. Do not apply more than 1 inch of irrigation water. 

ISK Flazasulfuron Herbicide controls weeds by inhibiting the acetolactate synthase (ALS) biochemical 

process. Some weeds may contain naturally occurring populations that are resistant to ALS inhibiting 

herbicides. Applications of ALS inhibiting herbicides, when used alone, over a period of time may lead to 

biotypes that are resistant to ALS herbicides. This then leads to a reduction in the level of control 

obtained through the use of these herbicides. To prevent or delay the build-up of ALS resistant weeds, 

weed management programs should include the use of appropriate registered herbicides for control of 

these weeds that have a different mode of action. Applications of herbicides with a different mode of 

action should be used during the same year or in sequential years.

APPLICATION RESTRICTIONS FOR ALL USES

 Do not apply ISK Flazasulfuron Herbicide aerially.

 Do not apply ISK Flazasulfuron Herbicide through any irrigation system.

 Do not apply to saturated soils.

 Do not apply to plants that are under stress due to drought, standing water, heavy insect and/or 

disease pressure, low soil fertility, etc.

 Do not mechanically incorporate into the soil.

 Do not apply more than 0.15 lb ai per acre per year.

 A 25 foot buffer for ground applications must be maintained between the point of direct 

application and the closest downwind edge of sensitive terrestrial habitats (including grasslands, 

forested areas, shelter belts, woodlots, hedgerows, riparian areas and shrub lands), sensitive 

freshwater habitats (including lakes, rivers, sloughs, ponds, creeks, marshes, streams, reservoirs 

and wetlands) and estuarine/marine habitats.

SPRAY DRIFT MANAGEMENT

 The applicator must be familiar with the effects of temperature inversions.

 Apply as a medium or coarser spray (ASAE Standard 572).
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 AVOIDING SPRAY DRIFT AT THE APPLICATION SITE IS THE RESPONSIBILITY OF THE 

APPLICATOR AND GROWER. The interaction of many equipment and weather-related 

factors determine the potential for spray drift. The applicator and the grower are responsible 

for considering all factors involved in minimizing drift potential. Where states have more 

stringent regulations, they must be observed.

 Avoid making applications when spray particles may be carried by air currents to areas where 

sensitive crops and plants are growing. Do not spray near sensitive plants if wind is gusty, 

below 2 mph, or in excess of 10 mph and moving in the direction of adjacent areas of 

sensitive crops or plants. Do not apply during temperature inversions. Always make 

applications when there is some air movement to determine the direction and distance of 

possible spray drift.

 To avoid injury to desirable plants, equipment used to apply ISK Flazasulfuron Herbicide 

should be thoroughly cleaned (see PROCEDURE FOR CLEANING SPRAY EQUIPMENT) 

before reusing to apply any other chemicals.

 Apply using a nozzle height of no more than 2 feet above the ground or crop canopy.

INFORMATION ON DROPLET SIZE

The best drift management strategy is to apply large droplets and to limit or eliminate small 

droplets. Applying large droplets reduces drift potential, but will not prevent drift if applications are 

made improperly or under unfavorable environmental conditions (see sections below).

CONTROLLING DROPLET SIZE

 Volume - Use sufficient volume to form droplets large enough to avoid drift potential.

 Pressure – Pressure and nozzle type and orientation should be carefully managed to avoid 

formation of fine droplets. 

 Number of nozzles - Use the minimum number of nozzles that provide uniform coverage.

 Nozzle Type - Use a nozzle type that is designed for the intended application. With most 

nozzle types, narrower spray angles produce larger droplets. Consider using low-drift 

nozzles. Properly designed solid stream nozzles should produce the lowest drift potential. 

Select nozzles, which do not have a wide discharge profile.

CALIBRATION

Equipment should be calibrated regularly according to manufacturer’s specifications.

WIND

Applications must not be made when wind exceeds 10 mph. Use caution when applying in wind 

speeds less than 2-3 mph because a temperature inversion may be present and wind direction 

may vary. Many factors, including droplet size and equipment type, determine drift potential at 

any given wind speed. Note: Local terrain can influence wind patterns. The applicator must be 

familiar with local wind patterns and must monitor wind conditions at the site at the time of 

application.

SENSITIVE AREAS

The pesticide must only be applied when the potential for drift to adjacent sensitive areas (e.g., 

residential areas, bodies of water, known habitat for threatened or endangered species, nontarget crops) is minimal (e.g., when wind is blowing away from the sensitive areas).”
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TEMPERATURE AND HUMIDITY

Low humidity and high temperature increase the evaporation rate of droplets and therefore 

increase spray drift potential. The applicator must compensate for temperature and humidity.

TEMPERATURE INVERSIONS

Because of high drift potential, applications must not be made when droplets may reach a 

temperature inversion layer. It is the applicator's responsibility to identify the presence of a 

temperature inversion at the time of application. Accurate measurements of temperature, relative 

humidity, and wind speed help determine if an inversion exists. Local sources of weather 

information may help identify the presence of temperature inversions.

MIXING AND LOADING INSTRUCTIONS

Ensure the spray system is clean and free of residues from previous applications. Fill the spray tank 1/2 

full with clean water. Ensure the agitation system is operating and sufficient to provide uniform spray

mixing during application and until the spray tank has been emptied. Add the appropriate amount of this 

product to the spray tank. Complete filling the spray tank to the desired level.

Prepare no more spray mixture than is needed for the immediate application. Avoid the overnight storage 

of ISK Flazasulfuron Herbicide spray mixtures.

Tank Mixtures

Tank mixes are generally used to broaden or extend control of the weed spectrum present. Tank mix 

herbicides must be registered for use on the intended crop. 

ISK Flazasulfuron Herbicide may be tank mixed with herbicides specified for use on labeled crops. Read 

and follow all label directions for each tank mix herbicide. Always follow precautions and restrictions on 

the most restrictive tank mix partner. ISK Flazasulfuron Herbicide is generally compatible with 

insecticides (non-organophosphate), fungicides, fertilizers and micronutrient products provided sufficient 

free water is available for dispersion of all the tank mix products. However, the physical compatibility of 

ISK Flazasulfuron Herbicide with tank mix partners should be evaluated before use. Use tank-mix 

combinations only when applicator experience indicates that the tank mix will not result in objectionable 

crop injury.

For tank mixtures, add individual components to the spray tank in the following sequence: water, water 

dispersible granules (this product), water-soluble bags, dry flowables, emulsifiable concentrates, drift 

control additives, water-soluble liquids, and nonionic surfactants.

Additive Use Requirements

The use of a non-ionic surfactant at 0.25 percent by volume (1 qt / 100 gal) provides a maximum

performance for all postemergence applications. Surfactant products must contain at least 50% nonionic 

surfactant (see label of adjuvant). Petroleum crop oil concentrate or methylated seed oil at 1% by volume 

(1 gal / 100 gal) can also enhance herbicide performance. Oil adjuvants must contain at least 15% 

surfactant emulsifiers and 80% high quality petroleum or methylated seed oil (see label of crop or seed 

oil). If another herbicide is tank mixed with ISK Flazasulfuron Herbicide, select additives authorized for 

use with both products.

Compatibility Test

Additives and tank mixes should be tested for compatibility by mixing in a small container prior to mixing 

in spray tank.

In a lidded glass jar (~1 quart size), add all mix partners, in their relative proportions. Invert, shake or mix 

the jar thoroughly. 
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If mixture forms precipitates (flakes or sludge), gels, balls up or forms oily films or layers, this indicates 

incompatibility. Though signs of incompatibility will typically be seen within 5 minutes of mixing, mixture 

should be observed for approximately 30 minutes.

Compatibility agents can be used to facilitate mixing. Add 1⁄4 teaspoon of the compatibility agent to the 

mix (assuming a mixing rate of 2 pints compatibility agent per 100 gallons spray mix). 

If compatibility agents to do not facilitate mixing, the mixture is incompatible and should not be used. 

Spray Equipment Clean Out:

After spraying ISK Flazasulfuron Herbicide and before using sprayer equipment for any other applications, 

the sprayer must be thoroughly cleaned using the following procedure.

 

1. Drain tank; thoroughly rinse inside of spray tanks with clean water (rinse about 1 minute per 25 

gallons of tank capacity). Loosen and physically remove any visible deposits with a stiff brush.

2. Fill the tank with clean water and add 1 gallon of household ammonia (contains at least 3% active

ingredient) for every 100 gallons of water. Circulate the cleaning solution through the tank and hoses 

for at least 15 minutes. Flush the cleaning solution through the hoses, boom and nozzles (1/4 volume 

of tank capacity) and then drain the tank.

3. Repeat step 1.

4. Repeat step 2.

5. Remove the nozzles and screen and clean separately in a bucket containing cleaning agent and 

water.

6. Rinse the tank, boom and hoses with clean water.

7. If only ammonia is used as a cleaner, the rinsate solution from both steps 2 and 4 may be applied 

back to the crop(s) as specified on the label. Do not exceed the maximum label use rate. If other 

cleaners are used, consult the cleaner label for rinsate disposal instructions. If no instructions are 

given, dispose of the rinsate on site or at an approved waste disposal facility.

(Attention: Do Not use Chlorine bleach with ammonia as a dangerous gas will form).

APPLICATION INFORMATION

Sprayer Preparation

Apply ISK Flazasulfuron Herbicide with spray equipment that has been cleaned and is free of pesticide 

deposits from previous pesticide use. Clean spray equipment according to manufacturer’s directions, see 

previous pesticide label for appropriate cleanup directions, or use ISK Flazasulfuron Herbicide Spray 

Equipment Clean Out procedures.

Preemergence Weed Control

Apply ISK Flazasulfuron Herbicide in a broadcast spray volume of 15 to 50 gallons of water per acre in a 

uniform application to the soil surface. Soil surfaces should be clean from crop residue and weed-free at 

the time of the application. If weeds, weeds residue or crop residue is present, these should be removed 

by light mechanical incorporation or other means. Once the application has been made the soil surface 

should not be disturbed.

Postemergence Weed Control

Applications for postemergence weed control should be made in 15 to 50 gallons of water per acre. Use 

the higher water volumes if vegetation or crop residue is present. For directed sprays a spray volume of 

20 or more gallons per acre is recommended. Best results are obtained when weeds are small and 

actively growing. Broadleaf weeds should be no larger than 2 to 4 inches and grasses should be no taller 

than 4 inches and prior to first tillering.
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Ground Applications

Broadcast: Apply ISK Flazasulfuron Herbicide using conventional low-pressure ground spray equipment 

with flat fan or flood nozzles (preemergence applications only). Follow manufacture’s recommendation 

for spraying pressure and boom height. Check spray equipment daily for proper maintenance and 

calibration.

Banded: ISK Flazasulfuron Herbicide can also be applied as a banded treatment. Banded rate and 

volume per treated area can be calculated by multiplying broadcast rate and volume per treated acre by

the band width in inches divided by the row width in inches.

Directed Spray: Apply ISK Flazasulfuron Herbicide as a low-pressure coarse spray in at least 20 gallons 

of water per acre. Follow manufacturer’s recommendations for nozzle spacing and operating pressure. 

Nozzles should be adjusted to adequately cover the weed foliage but minimize contact with the crop. Do 

not apply with hollow cone nozzles.

Spot application: For spot applications apply sprays uniformly to the soil for preemergence weed control 

or to weeds for postemergence weed control. Mix the required amount of ISK Flazasulfuron Herbicide 

with the specified amount of water. For preemergence application use one-half to one gallon of spray per 

1000 sq ft. For postemergence application use a minimum of 1 gallon of spray per 1000 sq ft and add a 

non-ionic surfactant at 0.5 fl oz (1 Tbs) per gallon of spray. If applying within an established crop use 

coarse low-pressure sprays and direct the spray to the soil beneath the plants. Do not allow spray to 

contact leaves or green stems of woody plants. Use 0.062 oz/gallon of water. Thoroughly agitate the 

spray solution thoroughly prior to application.

Note: ISK Flazasulfuron Herbicide may be applied in single or sequential applications. Sequential 

applications are made on a longer term interval such as fall followed by a spring application.

Rotational Crop Information

If rotating to another crop not on the label, allow a 12 month interval between the last application and the 

planting of the rotational crop. 
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CITRUS

Directions for use in Citrus.

ISK Flazasulfuron Herbicide may be applied only to Navel Orange, Valencia Orange, Lemon, Mandarin, 

and Tangerine orchards. 

Weed Control Rate (oz/acre) Specific Use Directions

Preemergence 2.14 - 2.85 oz

Dormant Season

(Preemergence

control only)

2.14 - 2.85 oz Make one application during the dormant season 

(November, December, January).

Postemergence 2.14 - 2.85 oz Apply to broadleaf weeds and less than 4 inches 

tall and before tillering of grasses. Use sufficient 

spray volume to obtain complete and uniform 

coverage. Use higher water volumes on larger 

weeds. Adjuvant use recommended.

Precautions: Apply only to 5th year planted trees and older. Apply only as a directed spray to the soil 

beneath the trees to prevent injury to the foliage and bark. Do not apply to areas where roots are 

exposed. Multiple applications of ISK Flazasulfuron Herbicide can be made, but maximum yearly

amounts must be followed (see Crop Restrictions). Rates listed above are for broadcast application. If 

making a banded application, see Product Information section of the label for calculating appropriate use 

rate. Do not apply to stony soils or sandy soils (greater than 85% sand). For postemergence applications, 

use an adjuvant (refer to Additive Use Requirements section on Page 6).

Tank Mixes: For postemergence weed control, consider tank mixing ISK Flazasulfuron Herbicide with a 

burndown herbicide, such as glyphosate, or glufosinate. For longer residual control of annual weeds, 

consider tank mixing ISK Flazasulfuron Herbicide with oxyfluorfen, oryzalin, diuron, norflurazon, simazine,

pendimethalin or other registered residual herbicides. Follow all label instructions, restrictions and 

precautions on both labels. Refer to Tank Mixtures section for additional information regarding tank 

mixes.

Crop Restrictions: Do not apply more than 2 applications at 2.85 oz/acre per acre per year. 

The Pre-Harvest Interval (PHI) for these crops is one (1) day. The minimum retreatment interval (RTI) is 3 

months.

WEEDS CONTROLLED

WEEDS CONTROLLED PREEMERGENCE

Grasses

Bluegrass, annual Poa annua

Barley, hare Hordeum leporinum

Bentgrass, creeping Agrostis stolonifera

Brome, downy Bromus tectorum

Fescue, rough Festuca scabrella

Fescue, sheep Festuca ovina

Fescue, tall Festuca arundinacea

Foxtail, giant Setaria faberi

Foxtail, green Setaria viridis

Foxtail, yellow Setaria glauca

Ryegrass, Italian Lolium multiflorum

Sandbur, Coastal Cenchrus spinifex

Sandbur, field Cenchrus incertus
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Broadleaves

Burclover, California Medicago polymorpha

Chickweed, common Stellaria media

Chickweed, mouse-ear Cerastium vulgatum

Clover, crimson Trifolium incarnatum

Clover, hop Trifolium aureum

Dandelion, cat's-ear Hypochoeris radicata

Filaree, broadleaf Erodium botrys

Filaree, redstem Erodium cicutarium

Fleabane, hairy Conyza bonariensis

Geranium Carolina Geranium carolinianum

Groundsel Senecio sp.

Groundsel, common Senecio vulgaris

Henbit Lamium amplexicaule

Lambsquarters, common Chenopodium album

Mallow, common Malva neglecta

Mallow, little Malva parviflora

Mustard Sinapsis sp.

Mustard, Indian Brasica juncea

Mustard, wild Brassica kaber

Pigweed, prostrate Amaranthus litoides

Pigweed, redroot Amaranthus retroflexus

Pigweed, tumble Amaranthus albus

Purslane, common Portulaca oleracea

Ragweed, common Ambrosia artemisiifolia

Rockpurslane, redmaids Calandrinia ciliata

Shepherd's-purse Capsella bursa-pastoris

Sowthistle, annual Sonchus oleraceus

Speedwell, corn Veronica arvensis

Spurge, creeping Euphorbia serpens

Spurge, prostrate Euphorbia humistrata

Spurge, spotted Euphorbia maculata

Willoweed, panicle Epilobium brachycarpum

Sedges

Kyllinga Kyllinga spp.

Yellow Nutsedge Cyperus esculentus

WEEDS PARTIALLY CONTROLLED PREEMERGENCE

Grasses

Crabgrass, large Digitaria sanguinalis

Needlegrass, California Nassella cernua

Watergrass, early Echinochloa oryzoides

Witchgrass Panicum calillare

Broadleaves

Dandelion Taraxacum officinale

Horseweed, Canada/Mare's tail Erigeron canadensis / Conyza canadensis

Hawksbeard, bristly Crepis setosa

Oxtongue, bristly Picris echioides

Sedges

Purple Nutsedge Cyperus rotundus

* Partial control means significant activity but not always at a level considered acceptable for commercial 

weed control. Repeat applications may be necessary.
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WEEDS CONTROLLED POSTEMERGENCE

Grasses

Bluegrass, annual Poa annua

Bentgrass, creeping Agrostis stolonifera

Brome, downy Bromus tectorum

Crabgrass, large Digitaria sanguinalis

Crabgrass,smooth Digitaria ischaemum

Fescue, rough Festuca scabrella

Fescue, sheep Festuca ovina

Fescue, tall Festuca arundinacea

Foxtail, giant Setaria faberi

Foxtail, green Setaria viridis

Foxtail, yellow Setaria glauca

Ryegrass, Italian Lolium multiflorum

Needlegrass, California Nassella cernua

Sandbur, Coastal Cenchrus spinifex

Sandbur, field Cenchrus incertus

Broadleaves

Bedstraw, catchweed Galium aparine

Burclover, California Medicago polymorpha

Carrot, wild Daucus carota

Chamomile, mayweed Anthemis cotula

Chickweed, common Stellaria media

Chickweed, mouse-ear Cerastium vulgatum

Clover, crimson Trifolium incarnatum

Clover, hop Trifolium aureum

Clover, large hop Trifolium campestre

Dandelion, cat's-ear Hypochoeris radicata

Dropwart, parsley water Oenanthe lachenalii

Falsedandelion, Carolina Pyrrhopappus carolinianus

Filaree, broadleaf Erodium botrys

Filaree, redstem Erodium cicutarium

Fleabane, hairy Conyza bonariensis

Geranium Carolina Geranium carolinianum

Groundsel Senecio sp.

Groundsel, common Senecio vulgaris

Henbit Lamium amplexicaule

Horseweed, Canada/Mare's tail Erigeron canadensis / Conyza canadensis

Lambsquarters, common Chenopodium album

Mallow, common Malva neglecta

Mallow, little Malva parviflora

Mustard Sinapsis sp.

Mustard, Indian Brasica juncea

Mustard, tumble Sisymbrium altissimum

Pansy, field Viola rafinesquil

Pepperweed, field Lepidium campestre

Pigweed, prostrate Amaranthus litoides

Pigweed, redroot Amaranthus retroflexus

Pigweed, tumble Amaranthus albus

Purslane, common Portulaca oleracea

Ragweed, common Ambrosia artemisiifolia

Rockpurslane, redmaids Calandrinia ciliata

Shepherd's-purse Capsella bursa-pastoris

Sowthistle, annual Sonchus oleraceus

Speedwell, corn Veronica arvensis
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Spurge, creeping Euphorbia serpens

Spurge, prostrate Euphorbia humistrata

Spurge, spotted Euphorbia maculata

Thistle, bull Cirsium vulgare

Thistle, Canada Cirsium arvense

Willoweed, panicle Epilobium brachycarpum

Wintergreen, chickweed Trientalis europaea

Sedges

Kyllinga Kyllinga spp.

Yellow Nutsedge Cyperus esculentus

WEEDS PARTIALLY CONTROLLED POSTEMERGENCE

Grasses

Polypogon, rabbitfoot Polypogon monspeliensis

Watergrass, early Echinochloa otyzoides

Witchgrass Panicum caplillare

Barley, hare Hordeum leporinum

Broadleaves

Dandelion Taraxacum officinale

Fleabane, rough Erigeron strigosus

Hawksbeard, bristly Crepis setosa

Oxtongue, bristly Picris echioides

Sedges

Purple Nutsedge Cyperus rotundus

* Partial control means significant activity but not always at a level considered acceptable for commercial 

weed control. Repeat applications may be necessary.
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GRAPE

Directions for use in grape.

ISK Flazasulfuron Herbicide may be applied to all grape varieties (including wine, table and raisin).

Weed Control Rate (oz/acre) Specific Use Directions

Preemergence 2.14 - 2.85 oz

Post emergence 2.14 - 2.85 oz Apply to broadleaf weeds and grasses less than 4

inches tall and before tillering of grasses. Use 

sufficient spray volume to obtain complete and 

uniform coverage. Use higher water volumes on 

larger weeds. Adjuvant use recommended.

Precautions: Apply only to 3rd year planted vines and older. Apply only as a directed spray to the soil 

beneath the vines to prevent injury to the foliage and bark of young vines. Use of a protective sleeve is 

required for third year vines to minimize injury potential. Do not apply to areas where roots are exposed. 

Multiple applications of ISK Flazasulfuron Herbicide can be made, but maximum yearly amounts must be 

followed (see Crop Restrictions). Rates listed above are for broadcast application. If making a banded 

application, see Product Information section of the label for calculating appropriate use rate. Do not apply 

to stony soils. For postemergence application, use an adjuvant (refer to Additive Use Requirements 

section on Page 6). 

Tank Mixes: For postemergence weed control, consider tank mixing ISK Flazasulfuron Herbicide with a 

burndown herbicide, such as glyphosate or glufosinate. For longer residual control of annual weeds, 

consider tank mixing ISK Flazasulfuron Herbicide with oxyfluorfen, oryzalin, diuron, norflurazon, simazine

or pendimethalin. Follow all label instructions, restrictions and precautions on both labels. Refer to Tank 

Mixtures section for additional information regarding tank mixes.

Crop Restrictions: Do not apply more than 2 applications at 2.85 oz/acre per acre per year. The PreHarvest Interval (PHI) for this crop is 75 days. The minimum retreatment interval (RTI) is 3 months.

WEEDS CONTROLLED

WEEDS CONTROLLED PREEMERGENCE

Grasses

Bluegrass, annual Poa annua

Barley, hare Hordeum leporinum

Bentgrass, creeping Agrostis stolonifera

Brome, downy Bromus tectorum

Fescue, rough Festuca scabrella

Fescue, sheep Festuca ovina

Fescue, tall Festuca arundinacea

Foxtail, giant Setaria faberi

Foxtail, green Setaria viridis

Foxtail, yellow Setaria glauca

Ryegrass, Italian Lolium multiflorum

Sandbur, Coastal Cenchrus spinifex

Sandbur, field Cenchrus incertus

Broadleaves

Burclover, California Medicago polymorpha

Chickweed, common Stellaria media

Chickweed, mouse-ear Cerastium vulgatum

Clover, crimson Trifolium incarnatum

Clover, hop Trifolium aureum
14

Dandelion Taraxacum officinale

Dandelion, cat's-ear Hypochoeris radicata

Filaree, broadleaf Erodium botrys

Filaree, redstem Erodium cicutarium

Fleabane, hairy Conyza bonariensis

Geranium Carolina Geranium carolinianum

Groundsel Senecio sp.

Groundsel, common Senecio vulgaris

Henbit Lamium amplexicaule

Lambsquarters, common Chenopodium album

Mallow, common Malva neglecta

Mallow, little Malva parviflora

Mustard Sinapsis sp.

Mustard, Indian Brasica juncea

Mustard, wild Brassica kaber

Pigweed, prostrate Amaranthus litoides

Pigweed, redroot Amaranthus retroflexus

Pigweed, tumble Amaranthus albus

Purslane, common Portulaca oleracea

Ragweed, common Ambrosia artemisiifolia

Rockpurslane, redmaids Calandrinia ciliata

Shepherd's-purse Capsella bursa-pastoris

Sowthistle, annual Sonchus oleraceus

Speedwell, corn Veronica arvensis

Spurge, creeping Euphorbia serpens

Spurge, prostrate Euphorbia humistrata

Spurge, spotted Euphorbia maculata

Willoweed, panicle Epilobium brachycarpum

Sedges

Kyllinga Kyllinga spp.

Yellow Nutsedge Cyperus esculentus

WEEDS PARTIALLY CONTROLLED PREEMERGENCE

Grasses

Crabgrass, large Digitaria sanguinalis

Needlegrass, California Nassella cernua

Watergrass, early Echinochloa otyzoides

Witchgrass Panicum caplillare

Broadleaves

Horseweed, Canada/Mare's tail Erigeron canadensis / Conyza canadensis

Hawksbeard, bristly Crepis setosa

Oxtongue, bristly Picris echioides

Sedges

Purple Nutsedge Cyperus rotundus

* Partial control means significant activity but not always at a level considered acceptable for commercial 

weed control. Repeat applications may be necessary.

WEEDS CONTROLLED POSTEMERGENCE

Grasses

Bluegrass, annual Poa annua

Bentgrass, creeping Agrostis stolonifera

Brome, downy Bromus tectorum

Crabgrass, large Digitaria sanguinalis
15

Crabgrass,smooth Digitaria ischaemum

Fescue, rough Festuca scabrella

Fescue, sheep Festuca ovina

Fescue, tall Festuca arundinacea

Foxtail, giant Setaria faberi

Foxtail, green Setaria viridis

Foxtail, yellow Setaria glauca

Ryegrass, Italian Lolium multiflorum

Needlegrass, California Nassella cernua

Sandbur, Coastal Cenchrus spinifex

Sandbur, field Cenchrus incertus

Broadleaves

Bedstraw, catchweed Galium aparine

Burclover, California Medicago polymorpha

Carrot, wild Daucus carota

Chamomile, mayweed Anthemis cotula

Chickweed, common Stellaria media

Chickweed, mouse-ear Cerastium vulgatum

Clover, crimson Trifolium incarnatum

Clover, hop Trifolium aureum

Clover, large hop Trifolium campestre

Dandelion, cat's-ear Hypochoeris radicata

Dropwart, parsley water Oenanthe lachenalii

Falsedandelion, Carolina Pyrrhopappus carolinianus

Filaree, broadleaf Erodium botrys

Filaree, redstem Erodium cicutarium

Fleabane, hairy Conyza bonariensis

Geranium, Carolina Geranium carolinianum

Groundsel Senecio sp.

Groundsel, common Senecio vulgaris

Henbit Lamium amplexicaule

Horseweed, Canada/Mare's tail Erigeron canadensis / Conyza canadensis

Lambsquarters, common Chenopodium album

Mallow, common Malva neglecta

Mallow, little Malva parviflora

Mustard Sinapsis sp.

Mustard, Indian Brasica juncea

Mustard, tumble Sisymbrium altissimum

Pansy, field Viola rafinesquil

Pepperweed, field Lepidium campestre

Pigweed, prostrate Amaranthus litoides

Pigweed, redroot Amaranthus retroflexus

Pigweed, tumble Amaranthus albus

Purslane, common Portulaca oleracea

Ragweed, common Ambrosia artemisiifolia

Rockpurslane, redmaids Calandrinia ciliata

Shepherd's-purse Capsella bursa-pastoris

Sowthistle, annual Sonchus oleraceus

Speedwell, corn Veronica arvensis

Spurge, creeping Euphorbia serpens

Spurge, prostrate Euphorbia humistrata

Spurge, spotted Euphorbia maculata

Thistle, bull Cirsium vulgare

Thistle, Canada Cirsium arvense

Willoweed, panicle Epilobium brachycarpum

Wintergreen, chickweed Trientalis europaea
16

Sedges

Kyllinga Kyllinga spp.

Yellow Nutsedge Cyperus esculentus

WEEDS PARTIALLY CONTROLLED POSTEMERGENCE

Grasses

Polypogon, rabbitfoot Polypogon monspeliensis

Watergrass, early Echinochloa otyzoides

Witchgrass Panicum caplillare

Barley, hare Hordeum leporinum

Broadleaves

Dandelion Taraxacum officinale

Fleabane, rough Erigeron strigosus

Hawksbeard, bristly Crepis setosa

Oxtongue, bristly Picris echioides

Sedges

Purple Nutsedge Cyperus rotundus

* Partial control means significant activity but not always at a level considered acceptable for commercial 

weed control. Repeat applications may be necessary.
17

SUGARCANE

Directions for use in sugarcane

ISK Flazasulfuron Herbicide may be applied to plant or ratoon sugarcane.

Weed Control Rate (oz/acre) Specific Use Directions

Over-the-Top 0.9 oz Apply prior to spiking or on ratoon sugarcane up to 24 inches 

tall.

Post-Directed 0.9 – 2.85 oz. Apply to sugarcane that is at least18 inches tall up through 

layby. The application should minimize contact to the whorl of 

the sugarcane and maximize contact with the weeds. Weeds 

should be small (1 – 2 inches) at the time of the application. 

Use the higher rate for larger weeds.

Precautions: Over-the-top applications may cause some yellowing of the sugarcane with occasional 

stunting. Symptoms may persist for a short period but have no effect on yield. For both over-the-top and 

post-directed applications an adjuvant should be used, refer to Additive Use Requirements page 6 

Multiple applications of ISK Flazasulfuron Herbicide can be made, but maximum yearly amounts must be 

followed (see Crop Restrictions). Rates listed above are for broadcast application. If making a banded 

application, see Banded Application Information (page 8) of the label for calculating appropriate use rate. 

Tank Mixes: ISK Flazasulfuron Herbicide may be tank mixed with atrazine, asulam, dicamba or diuron 

for both over-the-top and post-directed applications. A tank mix with ametryn should be used only for 

post-directed applications. Follow all label instructions, restrictions and precautions on both labels. Refer 

to Tank Mixtures section for additional information regarding tank mixes. 

Crop Restrictions: Do not apply more than 9.6 ounces per acre per year (0.15 lb ai per acre per year). 

The Pre-Harvest Interval (PHI) for this crop is 180 days. Sequential applications must be made at least 14 

days apart. If sugarcane is to be rotated to another crop not on the label allow a 12 month interval 

between the last application and the planting of the rotational crop.

WEEDS CONTROLLED

Weeds Controlled Preemergence at 0.9 to 1.8 oz/acre

Grasses

Chickweed, common Stellaria media

Henbit Lamium amplexicaule

Lambsquarters, common Chenopodium album

Purslane, common Portulaca oleracea

Weeds Controlled Preemergence at 2.14 to 2.85 oz/acre

Grasses

Bluegrass, annual Poa annua

Broadleaves

Chickweed, common Stellaria media

Dandelion Taraxacum officinale

Filaree, redstem Erodium cicutarium

Henbit Lamium amplexicaule

Lambsquarters, common Chenopodium album

Purslane, common Portulaca oleracea
18

Weeds Partially Controlled Preemergence

Broadleaves

Horseweed, Canada/Mare's tail Erigeron canadensis / Conyza canadensis

Partial control means significant activity but not always at a level considered acceptable for commercial 

weed control. Repeat applications may be necessary.

Weeds Controlled Postemergence at 0.9 to 1.8 oz/acre

Grasses

Bluegrass, annual Poa annua

Crabgrass, large Digitaria sanguinalis

Crabgrass,smooth Digitaria ischaemum

Broadleaves

Chickweed, common Stellaria media

Henbit Lamium amplexicaule

Lambsquarters, common Chenopodium album

Purslane, common Portulaca oleracea

Spurge, prostrate Euphorbia humistrata

Weeds Controlled Postemergence at 2.14 to 2.85 oz/acre

Grasses

Bluegrass, annual Poa annua

Crabgrass, large Digitaria sanguinalis

Crabgrass,smooth Digitaria ischaemum

Broadleaves

Chickweed, common Stellaria media

Filaree, redstem Erodium cicutarium

Henbit Lamium amplexicaule

Lambsquarters, common Chenopodium album

Pigweed, redroot Amaranthus retroflexus

Purslane, common Portulaca oleracea

Spurge, prostrate Euphorbia humistrata

Thistle, Canada† Cirsium arvense

Weeds Partially Controlled Postemergence

Grasses

Johnsongrass† Sorghum halepense

Broadleaves

Cutleaf, eveningprimrose Oenothera laciniata

Dandelion Taraxacum officinale

Horseweed, Canada/Mare’s tail Erigeron Canadensis / Conyza canadensis

Sedges

Nutsedge, yellow Cyperus esculentus

Partial control means significant activity but not always at a level considered acceptable for commercial 

weed control. Repeat applications may be necessary.

†Seedling only
19

TREE NUTS including: Hazelnut; Pecan; Pistachio; Black Walnut; English Walnut

[African nut-tree; Beechnut; Brazil nut; Brazilian pine; Bunya; Bur oak; Butternut; Cajou nut; 

Candlenut; Cashew; Chestnut; Chinquapin; Coconut; Coquito nut; Dika nut; Ginkgo; Guiana 

chestnut; Heartnut; Hickory nut; Japanese horse-chestnut; Macadamia nut; Mongongo nut; 

Monkey-pot; Monkey puzzle nut; Okari nut; Pachira nut; Peach palm nut; Pequi; Pili nut; Pine nut; 

Sapucaia nut; Tropical almond; Yellowhorn] 

Directions for use on Hazelnut, Pecan, Pistachio, Black Walnut and English Walnut

Weed Control Rate (oz/acre) Specific Use Directions

Preemergence 2.14 - 2.85 oz

Postemergence 2.14 - 2.85 oz Apply to broadleaf weeds less than 4 inches tall and before 

tillering of grasses. Use sufficient spray volume to obtain 

complete and uniform coverage. Use higher water volumes on 

larger weeds. Adjuvant use recommended.

Precautions: Apply only to 3rd year planted trees and older. Apply only as a directed spray to the soil 

beneath the trees to prevent injury to the foliage and bark of young trees. Use of a protective sleeve is 

required for third year trees to minimize injury potential. Do not apply to areas where roots are exposed. 

Multiple applications of ISK Flazasulfuron Herbicide can be made, but maximum yearly amounts must be 

followed (see Crop Restrictions). Rates listed above are for broadcast application. If making a banded 

application, see Product Information section of the label for calculating appropriate use rate. Do not apply 

to stony soils. For postemergence applications, use an adjuvant (refer to Additive Use Requirements 

section on Page 6). 

Tank Mixes: For postemergence weed control, consider tank mixing ISK Flazasulfuron Herbicide with a 

burndown herbicide, such as glyphosate, or glufosinate. For longer residual control of annual weeds, 

consider tank mixing ISK Flazasulfuron Herbicide with oxyfluorfen, oryzalin, or pendimethalin. Follow all 

label instructions, restrictions and precautions on both labels. Refer to Tank Mixtures section for 

additional information regarding tank mixes.

Crop Restrictions: Do not apply more than 2 applications at 2.85 oz/acre per acre per year. 

The Pre-Harvest Interval (PHI) for these crops is 130 days. The minimum retreatment interval (RTI) is 3 

months.

Directions for use on Almond in California

Weed Control Rate (oz/acre) Specific Use Directions

Preemergence 1.5 - 2.85 oz Apply as a preemergence application only during the months 

of October, November, December or January. Make only one 

(1) application each year.

Postemergence 1.5 - 2.85 oz Apply as a postemergence application only during the months 

of October, November, December or January. Make only one 

(1) application each year. Apply to broadleaf weeds less than 

4 inches tall and before tillering of grasses. Use sufficient 

spray volume to obtain complete and uniform coverage. Use 

higher water volumes on larger weeds. Adjuvant use 

recommended.

Precautions: Apply only to 5th year planted trees and older. Apply only as a directed spray to the soil 

beneath the trees to prevent injury to any remaining foliage and bark of young trees. Do not apply to 

areas where roots are exposed. Rates listed are for broadcast application. If making a banded 

application, see Product Information section of the label for calculating appropriate use rate. Do not apply 

to stony soils or soils with 90% or greater sand concentration.

Tank Mixes: For postemergence weed control, consider tank mixing ISK Flazasulfuron Herbicide with a 
20

burndown herbicide, such as glyphosate, or glufosinate. For longer residual control of annual weeds, 

consider tank mixing ISK Flazasulfuron Herbicide with oxyfluorfen, oryzalin, or pendimethalin. Follow all 

label instructions, restrictions and precautions on both labels. Refer to Tank Mixtures section for 

additional information regarding tank mixes.

Crop Restrictions: Do not apply more than 1 application at 1.5 - 2.85 oz/acre per acre per year.

WEEDS CONTROLLED

WEEDS CONTROLLED PREEMERGENCE

Grasses

Bluegrass, annual Poa annua

Barley, hare Hordeum leporinum

Bentgrass, creeping Agrostis stolonifera

Brome, downy Bromus tectorum

Fescue, rough Festuca scabrella

Fescue, sheep Festuca ovina

Fescue, tall Festuca arundinacea

Foxtail, giant Setaria faberi

Foxtail, green Setaria viridis

Foxtail, yellow Setaria glauca

Ryegrass, Italian Lolium multiflorum

Sandbur, Coastal Cenchrus spinifex

Sandbur, field Cenchrus incertus

Broadleaves

Burclover, California Medicago polymorpha

Chickweed, common Stellaria media

Chickweed, mouse-ear Cerastium vulgatum

Clover, crimson Trifolium incarnatum

Clover, hop Trifolium aureum

Dandelion Taraxacum officinale

Dandelion, cat's-ear Hypochoeris radicata

Filaree, broadleaf Erodium botrys

Filaree, redstem Erodium cicutarium

Fleabane, hairy Conyza bonariensis

Geranium Carolina Geranium carolinianum

Groundsel Senecio sp.

Groundsel, common Senecio vulgaris

Henbit Lamium amplexicaule

Lambsquarters, common Chenopodium album

Mallow, common Malva neglecta

Mallow, little Malva parviflora

Mustard Sinapsis sp.

Mustard, Indian Brasica juncea

Mustard, wild Brassica kaber

Pigweed, prostrate Amaranthus litoides

Pigweed, redroot Amaranthus retroflexus

Pigweed, tumble Amaranthus albus

Purslane, common Portulaca oleracea

Ragweed, common Ambrosia artemisiifolia

Rockpurslane, redmaids Calandrinia ciliata

Shepherd's-purse Capsella bursa-pastoris

Sowthistle, annual Sonchus oleraceus

Speedwell, corn Veronica arvensis

Spurge, creeping Euphorbia serpens

Spurge, prostrate Euphorbia humistrata
21

Spurge, spotted Euphorbia maculata

Willoweed, panicle Epilobium brachycarpum

Sedges

Kyllinga Kyllinga spp.

Yellow Nutsedge Cyperus esculentus

WEEDS PARTIALLY CONTROLLED PREEMERGENCE

Grasses

Crabgrass, large Digitaria sanguinalis

Needlegrass, California Nassella cernua

Watergrass, early Echinochloa otyzoides

Witchgrass Panicum caplillare

Broadleaves

Horseweed, Canada/Mare's tail Erigeron canadensis / Conyza canadensis

Hawksbeard, bristly Crepis setosa

Nightshade, silverleaf Solanum elaeagnifolium

Oxtongue, bristly Picris echioides

Sedges

Purple Nutsedge Cyperus rotundus

* Partial control means significant activity but not always at a level considered acceptable for commercial 

weed control. Repeat applications may be necessary.

WEEDS CONTROLLED POSTEMERGENCE

Grasses

Bluegrass, annual Poa annua

Bentgrass, creeping Agrostis stolonifera

Brome, downy Bromus tectorum

Crabgrass, large Digitaria sanguinalis

Crabgrass,smooth Digitaria ischaemum

Fescue, rough Festuca scabrella

Fescue, sheep Festuca ovina

Fescue, tall Festuca arundinacea

Foxtail, giant Setaria faberi

Foxtail, green Setaria viridis

Foxtail, yellow Setaria glauca

Ryegrass, Italian Lolium multiflorum

Needlegrass, California Nassella cernua

Sandbur, Coastal Cenchrus spinifex

Sandbur, field Cenchrus incertus

Broadleaves

Bedstraw, catchweed Galium aparine

Burclover, California Medicago polymorpha

Carrot, wild Daucus carota

Chamomile, mayweed Anthemis cotula

Chickweed, common Stellaria media

Chickweed, mouse-ear Cerastium vulgatum

Clover, crimson Trifolium incarnatum

Clover, hop Trifolium aureum

Clover, large hop Trifolium campestre

Dandelion, cat's-ear Hypochoeris radicata

Dropwart, parsley water Oenanthe lachenalii

Falsedandelion, Carolina Pyrrhopappus carolinianus
22

Filaree, broadleaf Erodium botrys

Filaree, redstem Erodium cicutarium

Fleabane, hairy Conyza bonariensis

Geranium, Carolina Geranium carolinianum

Groundsel Senecio sp.

Groundsel, common Senecio vulgaris

Henbit Lamium amplexicaule

Horseweed, Canada/Mare's tail Erigeron canadensis / Conyza canadensis

Lambsquarters, common Chenopodium album

Mallow, common Malva neglecta

Mallow, little Malva parviflora

Mustard Sinapsis sp.

Mustard, Indian Brasica juncea

Mustard, tumble Sisymbrium altissimum

Pansy, field Viola rafinesquil

Pepperweed, field Lepidium campestre

Pigweed, prostrate Amaranthus litoides

Pigweed, redroot Amaranthus retroflexus

Pigweed, tumble Amaranthus albus

Purslane, common Portulaca oleracea

Ragweed, common Ambrosia artemisiifolia

Rockpurslane, redmaids Calandrinia ciliata

Shepherd's-purse Capsella bursa-pastoris

Sowthistle, annual Sonchus oleraceus

Speedwell, corn Veronica arvensis

Spurge, creeping Euphorbia serpens

Spurge, prostrate Euphorbia humistrata

Spurge, spotted Euphorbia maculata

Thistle, bull Cirsium vulgare

Thistle, Canada Cirsium arvense

Willoweed, panicle Epilobium brachycarpum

Wintergreen, chickweed Trientalis europaea

Sedges

Kyllinga Kyllinga spp.

Yellow Nutsedge Cyperus esculentus

WEEDS PARTIALLY CONTROLLED POSTEMERGENCE

Grasses

Polypogon, rabbitfoot Polypogon monspeliensis

Watergrass, early Echinochloa otyzoides

Witchgrass Panicum caplillare

Barley, hare Hordeum leporinum

Broadleaves

Dandelion Taraxacum officinale

Fleabane, rough Erigeron strigosus

Hawksbeard, bristly Crepis setosa

Oxtongue, bristly Picris echioides

Sedges

Purple Nutsedge Cyperus rotundus

* Partial control means significant activity but not always at a level considered acceptable for commercial

weed control. Repeat applications may be necessary.
23

CONIFER TREES

Directions for use on Conifer Trees.

ISK Flazasulfuron Herbicide may be applied to container and field grown conifers. See table below for list 

of tolerant conifers.

Weed Control Rate (oz/acre) Specific Use Directions

Preemergence 2.14 - 2.85 oz

Postemergence 2.14 - 2.85 oz Apply to broadleaf weeds and grasses less than 4 inches tall

and before tillering of grasses. Use sufficient spray volume to 

obtain complete and uniform coverage. Use higher water 

volumes on larger weeds. Adjuvant use recommended.

Precautions: For postemergence application, use an adjuvant (refer to Additive Use Requirements 

section on Page 6). ISK Flazasulfuron Herbicide may be applied over-the-top to conifers prior to spring 

bud break or when conifers are sufficiently hardened off. Some needle burn may be seen on a new flush 

if plants are actively growing at the time of application but typically there is no effect on subsequent 

growth. Directed applications are preferred and recommended to reduce phytotoxicity potential. Rates 

listed above are for broadcast application. If making a banded application, see Banded Application 

Information (page 8) section of the label for calculating appropriate use rate.

Tank Mixes: Recommended tank mix partners include clethodim, glyphosate, napropamide, oryazlin, 

prodiamine, pronamide and simazine. Multiple applications of ISK Flazasulfuron Herbicide can be made, 

but maximum yearly amounts must be followed (see Crop Restrictions). Follow all label instructions, 

restrictions and precautions on both labels. Refer to Tank Mixtures section for additional information 

regarding tank mixes.

Crop Restrictions: Do not apply more than 9.6 ounces per acre per year (0.15 lb ai per acre per year).

Do not apply to conifer seedbeds. Do not apply to trees within 1 year of seeding. Directed sprays must 

be made to conifers that have new growth or are not sufficiently hardened off. The minimum retreatment 

interval (RTI) is 3 months.

WEEDS CONTROLLED

WEEDS CONTROLLED PREEMERGENCE

Grasses

Bluegrass, annual Poa annua

Barley, hare Hordeum leporinum

Bentgrass, creeping Agrostis stolonifera

Brome, downy Bromus tectorum

Fescue, rough Festuca scabrella

Fescue, sheep Festuca ovina

Fescue, tall Festuca arundinacea

Foxtail, giant Setaria faberi

Foxtail, green Setaria viridis

Foxtail, yellow Setaria glauca

Ryegrass, Italian Lolium multiflorum

Sandbur, Coastal Cenchrus spinifex

Sandbur, field Cenchrus incertus

Broadleaves

Burclover, California Medicago polymorpha

Chickweed, common Stellaria media

Chickweed, mouse-ear Cerastium vulgatum

Clover, crimson Trifolium incarnatum

Clover, hop Trifolium aureum

Dandelion Taraxacum officinale
24

Dandelion, cat's-ear Hypochoeris radicata

Filaree, broadleaf Erodium botrys

Filaree, redstem Erodium cicutarium

Fleabane, hairy Conyza bonariensis

Geranium Carolina Geranium carolinianum

Groundsel Senecio sp.

Groundsel, common Senecio vulgaris

Henbit Lamium amplexicaule

Lambsquarters, common Chenopodium album

Mallow, common Malva neglecta

Mallow, little Malva parviflora

Mustard Sinapsis sp.

Mustard, Indian Brasica juncea

Mustard, wild Brassica kaber

Pigweed, prostrate Amaranthus litoides

Pigweed, redroot Amaranthus retroflexus

Pigweed, tumble Amaranthus albus

Purslane, common Portulaca oleracea

Ragweed, common Ambrosia artemisiifolia

Rockpurslane, redmaids Calandrinia ciliata

Shepherd's-purse Capsella bursa-pastoris

Sowthistle, annual Sonchus oleraceus

Speedwell, corn Veronica arvensis

Spurge, creeping Euphorbia serpens

Spurge, prostrate Euphorbia humistrata

Spurge, spotted Euphorbia maculata

Willoweed, panicle Epilobium brachycarpum

Sedges

Kyllinga Kyllinga spp.

Yellow Nutsedge Cyperus esculentus

WEEDS PARTIALLY CONTROLLED PREEMERGENCE

Grasses

Crabgrass, large Digitaria sanguinalis

Needlegrass, California Nassella cernua

Watergrass, early Echinochloa otyzoides

Witchgrass Panicum caplillare

Broadleaves

Horseweed, Canada/Mare's tail Erigeron canadensis / Conyza canadensis

Hawksbeard, bristly Crepis setosa

Oxtongue, bristly Picris echioides

Sedges

Purple Nutsedge Cyperus rotundus

* Partial control means significant activity but not always at a level considered acceptable for commercial 

weed control. Repeat applications may be necessary.

WEEDS CONTROLLED POSTEMERGENCE

Grasses

Bluegrass, annual Poa annua

Bentgrass, creeping Agrostis stolonifera

Brome, downy Bromus tectorum

Crabgrass, large Digitaria sanguinalis

Crabgrass,smooth Digitaria ischaemum
25

Fescue, rough Festuca scabrella

Fescue, sheep Festuca ovina

Fescue, tall Festuca arundinacea

Foxtail, giant Setaria faberi

Foxtail, green Setaria viridis

Foxtail, yellow Setaria glauca

Ryegrass, Italian Lolium multiflorum

Needlegrass, California Nassella cernua

Sandbur, Coastal Cenchrus spinifex

Sandbur, field Cenchrus incertus

Broadleaves

Bedstraw, catchweed Galium aparine

Burclover, California Medicago polymorpha

Carrot, wild Daucus carota

Chamomile, mayweed Anthemis cotula

Chickweed, common Stellaria media

Chickweed, mouse-ear Cerastium vulgatum

Clover, crimson Trifolium incarnatum

Clover, hop Trifolium aureum

Clover, large hop Trifolium campestre

Dandelion, cat's-ear Hypochoeris radicata

Dropwart, parsley water Oenanthe lachenalii

Falsedandelion, Carolina Pyrrhopappus carolinianus

Filaree, broadleaf Erodium botrys

Filaree, redstem Erodium cicutarium

Fleabane, hairy Conyza bonariensis

Geranium Carolina Geranium carolinianum

Groundsel Senecio sp.

Groundsel, common Senecio vulgaris

Henbit Lamium amplexicaule

Horseweed, Canada/Mare's tail Erigeron canadensis / Conyza canadensis

Lambsquarters, common Chenopodium album

Mallow, common Malva neglecta

Mallow, little Malva parviflora

Mustard Sinapsis sp.

Mustard, Indian Brasica juncea

Mustard, tumble Sisymbrium altissimum

Pansy, field Viola rafinesquil

Pepperweed, field Lepidium campestre

Pigweed, prostrate Amaranthus litoides

Pigweed, redroot Amaranthus retroflexus

Pigweed, tumble Amaranthus albus

Purslane, common Portulaca oleracea

Ragweed, common Ambrosia artemisiifolia

Rockpurslane, redmaids Calandrinia ciliata

Shepherd's-purse Capsella bursa-pastoris

Sowthistle, annual Sonchus oleraceus

Speedwell, corn Veronica arvensis

Spurge, creeping Euphorbia serpens

Spurge, prostrate Euphorbia humistrata

Spurge, spotted Euphorbia maculata

Thistle, bull Cirsium vulgare

Thistle, Canada Cirsium arvense

Willoweed, panicle Epilobium brachycarpum

Wintergreen, chickweed Trientalis europaea
26

Sedges

Kyllinga Kyllinga spp.

Yellow Nutsedge Cyperus esculentus

WEEDS PARTIALLY CONTROLLED POSTEMERGENCE

Grasses

Polypogon, rabbitfoot Polypogon monspeliensis

Watergrass, early Echinochloa otyzoides

Witchgrass Panicum caplillare

Barley, hare Hordeum leporinum

Broadleaves

Dandelion Taraxacum officinale

Fleabane, rough Erigeron strigosus

Hawksbeard, bristly Crepis setosa

Oxtongue, bristly Picris echioides

Sedges

Purple Nutsedge Cyperus rotundus

* Partial control means significant activity but not always at a level considered acceptable for commercial 

weed control. Repeat applications may be necessary.

Tolerant Conifers

Common Name Scientific Name

Balsam fir Abies balsamea

Fraser fir Abies fraseri

Grand fir Abies grandis

Noble fir Abies procera

Nordman fir Abies nordmanniana

White fir Abies concolor

Blue spruce Picea pungens

Norway spruce Picea abies

Eastern white pine Pinus strobes

Red pine Pinus resinosa

Scotch pine Pinus sylvestris

Virginia pine Pinus virginiana

White pine Pinus strobes

Douglas fir Pseudotsuga menziesii

Leyland cypress Cupressocyperis leylandii

Note: Evaluations have shown the above listed conifers to be tolerant to Flazasulfuron. However, it is 

impossible to evaluate the product under all growing conditions. Until the user is familiar with the results 

under local conditions, normal judgment and care should be exercised. This product may be used on 

conifers not listed above provided that the user evaluate the effects of Flazasulfuron on a small number of 

plants under commercial growing condition at 4 to 6 weeks after the application for phytotoxic effects 

This will determine if Flazasulfuron can safely be used on a large scale application.
27

INDUSTRIAL VEGETATIVE MANAGEMENT/NON-AGRICULTURAL USES

Directions for use:

ISK Flazasulfuron Herbicide may be applied for weed control on private, public and military lands to the 

following uncultivated nonagricultural areas: airports, ditch banks, dry canals, highway, railroad and utility 

rights-of-way, industrial sites, manufacturing sites, storage areas and warehouse areas. 

Bermudagrass and Bahiagrass release

Weed Control Rate (oz/acre) Specific Use Directions

Postemergence 3.0 oz Flazasulfuron may be applied after bermudagrass has broken 

dormancy and is well established and actively growing. Best 

results are obtained if weeds are small or 1 to 2 weeks after 

mowing. Follow-up applications may be made at 4 to 6 weeks 

after the first application. Applications should use sufficient 

water for thorough coverage and uniform pattern. Applications 

may be made as either a broadcast or directed spray.

Precautions: For postemergence application, use an adjuvant (refer to Additive Use Requirements 

section on Page 6). Do not use on areas or plants not specified above. Do not use near residential 

properties or near sensitive desired plants. Do not apply where runoff water may flow onto agricultural 

lands. Multiple applications of ISK Flazasulfuron Herbicide can be made, but maximum yearly amounts 

must be followed (see Crop Restrictions).

Tank Mixes: Follow all label instructions, restrictions and precautions on both labels. Refer to Tank 

Mixtures section for additional information regarding tank mixes.

Restrictions: Do not apply more than 9.6 ounces per acre per year (0.15 lb ai per acre per year). The 

minimum retreatment interval (RTI) is 45 days.

WEEDS CONTROLLED

WEEDS CONTROLLED PREEMERGENCE

Grasses

Bluegrass, annual Poa annua

Barley, hare Hordeum leporinum

Bentgrass, creeping Agrostis stolonifera

Brome, downy Bromus tectorum

Fescue, rough Festuca scabrella

Fescue, sheep Festuca ovina

Fescue, tall Festuca arundinacea

Foxtail, giant Setaria faberi

Foxtail, green Setaria viridis

Foxtail, yellow Setaria glauca

Ryegrass, Italian Lolium multiflorum

Sandbur, Coastal Cenchrus spinifex

Sandbur, field Cenchrus incertus

Broadleaves

Burclover, California Medicago polymorpha

Chickweed, common Stellaria media

Chickweed, mouse-ear Cerastium vulgatum

Clover, crimson Trifolium incarnatum

Clover, hop Trifolium aureum

Dandelion Taraxacum officinale

Dandelion, cat's-ear Hypochoeris radicata
28

Filaree, broadleaf Erodium botrys

Filaree, redstem Erodium cicutarium

Fleabane, hairy Conyza bonariensis

Geranium Carolina Geranium carolinianum

Groundsel Senecio sp.

Groundsel, common Senecio vulgaris

Henbit Lamium amplexicaule

Lambsquarters, common Chenopodium album

Mallow, common Malva neglecta

Mallow, little Malva parviflora

Mustard Sinapsis sp.

Mustard, Indian Brasica juncea

Mustard, wild Brassica kaber

Pigweed, prostrate Amaranthus litoides

Pigweed, redroot Amaranthus retroflexus

Pigweed, tumble Amaranthus albus

Purslane, common Portulaca oleracea

Ragweed, common Ambrosia artemisiifolia

Rockpurslane, redmaids Calandrinia ciliata

Shepherd's-purse Capsella bursa-pastoris

Sowthistle, annual Sonchus oleraceus

Speedwell, corn Veronica arvensis

Spurge, creeping Euphorbia serpens

Spurge, prostrate Euphorbia humistrata

Spurge, spotted Euphorbia maculata

Willoweed, panicle Epilobium brachycarpum

Sedges

Kyllinga Kyllinga spp.

Yellow Nutsedge Cyperus esculentus

WEEDS PARTIALLY CONTROLLED PREEMERGENCE

Grasses

Crabgrass, large Digitaria sanguinalis

Needlegrass, California Nassella cernua

Watergrass, early Echinochloa otyzoides

Witchgrass Panicum caplillare

Broadleaves

Horseweed, Canada/Mare's tail Erigeron canadensis / Conyza canadensis

Hawksbeard, bristly Crepis setosa

Oxtongue, bristly Picris echioides

Sedges

Purple Nutsedge Cyperus rotundus

* Partial control means significant activity but not always at a level considered acceptable for commercial 

weed control. Repeat applications may be necessary.

WEEDS CONTROLLED POSTEMERGENCE

Grasses

Bluegrass, annual Poa annua

Bentgrass, creeping Agrostis stolonifera

Brome, downy Bromus tectorum

Crabgrass, large Digitaria sanguinalis

Crabgrass,smooth Digitaria ischaemum

Fescue, rough Festuca scabrella
29

Fescue, sheep Festuca ovina

Fescue, tall Festuca arundinacea

Foxtail, giant Setaria faberi

Foxtail, green Setaria viridis

Foxtail, yellow Setaria glauca

Ryegrass, Italian Lolium multiflorum

Needlegrass, California Nassella cernua

Sandbur, Coastal Cenchrus spinifex

Sandbur, field Cenchrus incertus

Broadleaves

Bedstraw, catchweed Galium aparine

Burclover, California Medicago polymorpha

Carrot, wild Daucus carota

Chamomile, mayweed Anthemis cotula

Chickweed, common Stellaria media

Chickweed, mouse-ear Cerastium vulgatum

Clover, crimson Trifolium incarnatum

Clover, hop Trifolium aureum

Clover, large hop Trifolium campestre

Dandelion, cat's-ear Hypochoeris radicata

Dropwart, parsley water Oenanthe lachenalii

Falsedandelion, Carolina Pyrrhopappus carolinianus

Filaree, broadleaf Erodium botrys

Filaree, redstem Erodium cicutarium

Fleabane, hairy Conyza bonariensis

Geranium Carolina Geranium carolinianum

Groundsel Senecio sp.

Groundsel, common Senecio vulgaris

Henbit Lamium amplexicaule

Horseweed, Canada/Mare's tail Erigeron canadensis / Conyza canadensis

Lambsquarters, common Chenopodium album

Mallow, common Malva neglecta

Mallow, little Malva parviflora

Mustard Sinapsis sp.

Mustard, Indian Brasica juncea

Mustard, tumble Sisymbrium altissimum

Pansy, field Viola rafinesquil

Pepperweed, field Lepidium campestre

Pigweed, prostrate Amaranthus litoides

Pigweed, redroot Amaranthus retroflexus

Pigweed, tumble Amaranthus albus

Purslane, common Portulaca oleracea

Ragweed, common Ambrosia artemisiifolia

Rockpurslane, redmaids Calandrinia ciliata

Shepherd's-purse Capsella bursa-pastoris

Sowthistle, annual Sonchus oleraceus

Speedwell, corn Veronica arvensis

Spurge, creeping Euphorbia serpens

Spurge, prostrate Euphorbia humistrata

Spurge, spotted Euphorbia maculata

Thistle, bull Cirsium vulgare

Thistle, Canada Cirsium arvense

Willoweed, panicle Epilobium brachycarpum

Wintergreen, chickweed Trientalis europaea
30

Sedges

Kyllinga Kyllinga spp.

Yellow Nutsedge Cyperus esculentus

WEEDS PARTIALLY CONTROLLED POSTEMERGENCE

Grasses

Polypogon, rabbitfoot Polypogon monspeliensis

Watergrass, early Echinochloa otyzoides

Witchgrass Panicum caplillare

Barley, hare Hordeum leporinum

Broadleaves

Dandelion Taraxacum officinale

Fleabane, rough Erigeron strigosus

Hawksbeard, bristly Crepis setosa

Oxtongue, bristly Picris echioides

Sedges

Purple Nutsedge Cyperus rotundus

* Partial control means significant activity but not always at a level considered acceptable for commercial 

weed control. Repeat applications may be necessary.
31

STORAGE AND DISPOSAL

Do not contaminate water, food, or feed by storage and disposal.

Pesticide Storage 

Keep out of reach of children and animals. Store in original containers only. Store in a cool, dry place and 

avoid excess heat. Carefully open containers. After partial use, fold and roll back bags, clamp and close 

tightly. Do not put concentrate or dilute material into food or drink containers. Do not contaminate other 

pesticides, fertilizers, water, food or feed by storage or disposal. 

In case of spill, avoid contact, isolate area and keep out animals and unprotected persons. Confine spills. 

Call CHEMTREC 1-(800) 424-9300. 

To confine spill: Cover to prevent dispersal. Place damaged package in a holding container. Identify 

contents. 

Pesticide Disposal

Wastes resulting from the use of this product may be disposed of on site or at an approved waste 

disposal facility. 

Container Disposal

[if product is in fiber drum with liner]

Nonrefillable container. DO NOT use or refill this container. Completely empty liner by shaking and 

tapping sides and bottom to loosen clinging particles. Empty residue into formulation equipment. Then 

offer for recycling, if available, or dispose of liner in a sanitary landfill or by incineration, or, if allowed by

State and Local authorities, by burning. If burned, stay out of smoke. If drum is contaminated and cannot 

be reused, dispose of it in the manner required for its liner.

[if product is in plastic containers]

Nonrefillable container. DO NOT reuse or refill this container. Triple rinse container (or equivalent) 

promptly after emptying. Triple rinse as follows: Empty the remaining contents into application equipment 

or a mix tank and drain for 10 seconds after the flow begins to drip. Fill the container 1⁄4 full with water 

and recap. Shake for 10 seconds. Pour rinsate into application equipment or a mix tank or store rinsate 

for later use or disposal. Drain for 10 seconds after the flow begins to drip. Repeat this procedure two 

more times. Then offer for recycling if available or dispose of empty container in a sanitary landfill or by

incineration, or, if allowed by State and Local authorities, by burning. If burned, stay out of smoke.

WARRANTY AND LIMITATION OF DAMAGES

Seller warrants to those persons lawfully acquiring title to this product that at the time of first sale of this 

product by Seller that this product conformed to its chemical description and was reasonably fit for the 

purposes stated on the label when used in accordance with Seller’s directions under normal conditions of 

use, and Buyers and users of this product assume the risk of any use contrary to such directions. TO 

THE FULLEST EXTENT PERMITTED BY LAW, EXCEPT AS PROVIDED ELSEWHERE IN WRITING 

CONTAINING AN EXPRESS REFERENCE TO THIS WARRANTY AND LIMITATION OF DAMAGES, 

SELLER MAKES NO OTHER EXPRESS OR IMPLIED WARRANTY OR GUARANTY, INCLUDING 

ANY OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS OR OF MERCHANTABILITY, AND 

NO AGENT OF SELLER IS AUTHORIZED TO DO SO. To the fullest extent permitted by law, in no 

event shall Seller’s liability for any breach of warranty or guaranty exceed the purchase price of the 

product as to which a claim is made. To the fullest extent permitted by law, buyers and users of this 

product are responsible for all loss or damage from use or handling of this product which results from 

conditions beyond the control of Seller, including, but not limited to, incompatibility with other products 

unless otherwise expressly provided in Directions for Use of this product, weather conditions, cultural 

practices, moisture conditions or other environmental conditions outside of the ranges that are generally 

recognized as being conducive to good agricultural and/or horticultural practices.