Registration Notice Conditional v.20150320

U.S. ENVIRONMENTAL PROTECTION AGENCY

Office of Pesticide Programs

Registration Division (7505P)

1200 Pennsylvania Ave., N.W.

Washington, D.C. 20460

EPA Reg. Number:

100-1477

Date of Issuance:

8/28/2015

NOTICE OF PESTICIDE: 

 X Registration

 Reregistration

Term of Issuance: 

Conditional

 

(under FIFRA, as amended)

Name of Pesticide Product:

Ascernity

Name and Address of Registrant (include ZIP Code):

Adora Clark

Syngenta Crop Protection, LLC

P.O. Box 18300

410 Swing Road

Greensboro, NC 27419

Note: Changes in labeling differing in substance from that accepted in connection with this registration must be submitted to and accepted by the 

Registration Division prior to use of the label in commerce. In any correspondence on this product always refer to the above EPA registration number.

On the basis of information furnished by the registrant, the above named pesticide is hereby registered 

under the Federal Insecticide, Fungicide and Rodenticide Act.

Registration is in no way to be construed as an endorsement or recommendation of this product by the 

Agency. In order to protect health and the environment, the Administrator, on his motion, may at any 

time suspend or cancel the registration of a pesticide in accordance with the Act. The acceptance of any 

name in connection with the registration of a product under this Act is not to be construed as giving the 

registrant a right to exclusive use of the name or to its use if it has been covered by others.

This product is conditionally registered in accordance with FIFRA section 3(c)(7)(C). You must comply 

with the following conditions:

1. Submit and/or cite all data required for registration/reregistration/registration review of your 

product under FIFRA when the Agency requires all registrants of similar products to submit such 

data. 

Signature of Approving Official:

Shaja B. Joyner, Product Manager 20

Fungicide-Herbicide Branch

Registration Division 7505P

Date:

 08/28/2015

EPA Form 8570-6
Page 2 of 4

EPA Reg. No. 100-1477 

Decision No. 473384

2. You are required to submit to the Agency the following studies by the dates indicated below.

a.Acute oral toxicity to larval honey bees.

b. Chronic oral toxicity to larval honey bees.

c. Chronic oral toxicity to adult honey bees.

Protocols for both of the chronic bee studies must be submitted within 60 days of the 

registration. The deadline for you to submit each of the bee studies is 09/01/18. 

Tier II studies are required if triggered by the Tier I studies listed above. In the event Tier III 

studies are triggered by the Tier II results, they will also be required. If any higher tier 

studies are necessary, you must submit them to EPA within 3 years of notification by the 

agency that such higher tier studies are required. 

d. A controlled water monitoring study to provide further data on the environmental fate of

benzovindiflupyr in the aquatic environment must be submitted to the Agency. A protocol 

must be submitted within 90 days of the registration. A preliminary report must be submitted 

by 12/31/16. An updated report must be submitted by 12/31/17. The completed study must 

be submitted by 09/01/18. If the EPA does not respond to the submitted protocol within 

sixty (60) days of receipt, EPA and the Registrant will discuss and agree to reasonable 

extensions of the dates for submission of the preliminary report and study. 

e. Field study to determine the effectiveness of vegetative filter strips (VFS). The study should

address effectiveness relative to run-off reduction, sediment transport rates and delivery

totals of benzovindiflupyr in water bodies. A protocol must be submitted within 90 days of

the registration. A preliminary report must be submitted by 12/31/16. The deadline for you to

submit the study is 09/01/18. If the EPA does not respond to the submitted protocol within

sixty (60) days of receipt, EPA and the Registrant will discuss and agree to reasonable

extensions of the dates for submission of the preliminary report and study.

f. Based on the EPA’s review of the results of the studies in pagragraphs d. and e., EPA may

determine either that the study described in paragraph d. must be extended or that other

studies or monitoring are needed in order to allow the Agency to continue to conclude that

benzovindiflupyr does not pose unreasonable adverse effects on the environment insofar as

aquatic risk are concerned as per the agreement letter of August 28, 2015.

g.In addition to the VFS study, the registrant within one hundred and twenty (120) days of

registration must submit plans for an educational program on VFS. The program will start in

2015. It will include educational resources on best practices for construction and

maintenance of filter strips and information on the effectiveness of vegetative filter strips as

related to their size. The educational resources will be focused on use by landowners and

those leasing land. The resources may be generic (not chemical or product-specific) and will

be developed in collaboration with partners in the Extension, University, State Lead Agency,

and other education communities to meet State and local needs. Copies of all educational

materials must be submitted to the Agency. Additionally, status reports on the materials’
Page 3 of 4

EPA Reg. No. 100-1477 

Decision No. 473384

creation, distribution efforts, and any public feedback resulting from trainings/dissemination 

of the materials are required. 

h. An additional chronic (42-d) sediment toxicity study with the freshwater amphipod, Hyalella

azteca. A protocol must be submitted within ninety (90) days of the issuance of the

registration. The deadline for the study is 09/01/17.

If the EPA determines, based on the data submitted pursuant to the conditions in the Notice or on any 

other data or other information received by the Agency, that one or more label revisions are required to 

prevent unreasonable adverse effects on the environment insofar as aquatic risks are concerned, EPA 

may notify the Registrant of the Agency’s determination that identified revisions to the label are 

necessary as per the agreement letter from the Registrant dated August 28, 2015. If labels revisions are 

necessary to mitigate adverse effects, you must incorporate all revisions identified by the Agency and 

submit for approval a revised label within sixty (60) days of the Agency’s notification to you of the need 

for such a revised label. In the event of such a revision, product may not be released for shipment under 

the terms of this registration more than twelve (12) months after the Agency approves such a revised 

label unless the product bears the appropriate revised label. 

3. Make the following label changes before you release the product for shipment:

 Revise the EPA Registration Number to read, “EPA Reg. No. 100-1477.”

4. Submit one copy of the final printed label for the record before you release the product for

shipment.

Should you wish to add/retain a reference to the company’s website on your label, then please be aware 

that with such a reference, the website becomes labeling under the Federal Insecticide Fungicide and 

Rodenticide Act and is subject to review by the Agency. If the website is false or misleading, the 

product would be misbranded and unlawful to sell or distribute under FIFRA section 12(a)(1)(E). 40 

CFR 156.10(a)(5) list examples of statements EPA may consider false or misleading. In addition, 

regardless of whether a website is referenced on your product’s label, claims made on the website may 

not substantially differ from those claims approved through the registration process. Therefore, should 

the Agency find or if it is brought to our attention that a website contains false or misleading statements 

or claims substantially differing from the EPA approved registration, the website will be referred to the 

EPA’s Office of Enforcement and Compliance.

If you fail to satisfy these data requirements, EPA will consider appropriate regulatory action including, 

among other things, cancellation under FIFRA section 6(e). Your release for shipment of the product 

constitutes acceptance of these conditions. 
Page 4 of 4

EPA Reg. No. 100-1477

Decision No. 473384

A stamped copy of the label is enclosed for your records. Please also note that the record for this 

product currently contains the following CSFs:

 Basic CSF dated 03/27/2013

 Alternate CSF 1 dated 03/27/2013

 Alternate CSF 2 dated 03/27/2013

If you have any questions, please contact Shaunta Hill by phone at 703-347-8961, or via email at 

hill.shaunta@epa.gov.
GROUP 7 3 FUNGICIDE

AscernityTM 

Fungicide

A broad-spectrum fungicide for prevention and control of certain diseases in golf course 

turfgrasses only 

Active Ingredients:

Benzovinduiflupyr* .................................................................................................. 2.24% 

Difenoconazole** ..................................................................................................... 7.48% 

Other Ingredients: 90.28% 

Total: 100.0% 

 *CAS No. 1072957-71-1 

**CAS No.119446-68-3 

AscernityTM contains 0.20 lb of bezovindiflupyr and 0.66 lb of difenoconazole per gallon. 

KEEP OUT OF REACH OF CHILDREN. 

CAUTION

See additional precautionary statements and directions for use inside booklet. 

EPA Reg. No. 100-RUTT 

EPA Est. 

Net Contents: 

08/28/2015

100-1477
Ascernity 

Page 2

FIRST AID 

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

minutes

x Remove contact lenses, if present, after the first 5 minutes, then

continue rinsing eye.

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

If swallowed x Call a poison control center or doctor immediately for treatment

advice.

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

x Do not induce vomiting unless told to by a poison control center

or doctor.

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

If on skin or 

clothing

x Take off contaminated clothing.

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

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

If inhaled x Move person to fresh air.

x If person is not breathing, all 911 or an ambulance, then give

artificial respiration, preferably mouth-to-mouth if possible.

x 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 (Human or Animal) 

Or Chemical Emergency Assistance (Spill, Leak, Fire or Accident) 

Call 

1-800-888-8372

PRECAUTIONARY STATEMENTS 

Hazards to Humans and Domestic Animals

CAUTION

Causes moderate eye irritation. Harmful if swallowed. Avoid contact with skin, eyes 

or clothing. :HDUSURWHFWLYHH\HZHDU
Ascernity 

Page 3

Personal Protective Equipment (PPE) 

Applicators and other handlers must wear: 

x Long-sleeved shirt and long pants 

x Shoes plus socks 

x Chemical-resistant gloves such as barrier laminate, butyl rubber 14 mils, nitrile 

rubber 14 mils, neoprene rubber 14 mils, natural rubber 14 mils, 

polyethylene, polyvinyl chloride (PVC) 14 mils, or Viton®. 

User Safety Requirements 

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. 

Engineering Control Statement 

When handlers use closed systems, enclosed cabs, or aircraft in a manner that meets 

the requirements listed in the Worker Protection Standard (WPS) for agricultural 

pesticides [40 CFR 170.240(d)(4-6)], the handler PPE requirements may be reduced or 

modified as specified in the WPS. 

User Safety Recommendations 

Users should: 

x Wash hands before eating, drinking, chewing gum, using tobacco, or using the 

toilet. 

x Remove clothing/PPE immediately if pesticide gets inside. Then wash 

thoroughly and put on clean clothing. 

x 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 

Benzovindiflupyr and difenoconazole are toxic to fish, mammals and aquatic 

invertebrates. Drift and runoff may be hazardous to aquatic organisms in water 

adjacent to treated area. For terrestrial uses: 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 washwater or rinsate. 

 
Ascernity 

Page 4

Surface Water Advisory 

This product may impact surface water quality due to runoff of rain water. This is 

especially true for poorly draining soils and soils with shallow ground water. Do not 

apply within 15 feet of surface water features such as ponds, streams, and springs. 

Avoid applications when rainfall is expected to occur within 48 hours. Sound erosion 

control practices will reduce this product’s potential to reach aquatic sediment via runoff. 

Physical or Chemical Hazards

Do not mix or allow to come into contact with oxidizing agents. Hazardous chemical 

reactions may occur. 
Ascernity 

Page 5

CONDITIONS OF SALE AND LIMITATION OF WARRANTY AND LIABILITY 

NOTICE: Read the entire Directions for Use and Conditions of Sale and Limitation of 

Warranty and Liability before buying or using this product. If the terms are not 

acceptable, return the product at once, unopened, and the purchase price will be 

refunded. 

The Directions for Use of this product must be followed carefully. It is impossible to 

eliminate all risks inherently associated with the use of this product. Turf injury, 

ineffectiveness or other unintended consequences may result because of such factors 

as manner of use or application, weather or crop conditions, presence of other materials 

or other influencing factors in the use of the product, which are beyond the control of 

SYNGENTA CROP PROTECTION, LLC or Seller. To the extent permitted by 

applicable law, Buyer and User agree to hold SYNGENTA and Seller harmless for any 

claims relating to such factors. 

SYNGENTA warrants that this product conforms to the chemical description on the label 

and is reasonably fit for the purposes stated in the Directions for Use, subject to the 

inherent risks referred to above, when used in accordance with directions under normal 

use conditions. To the extent permitted by applicable law: (1) this warranty does not 

extend to the use of this product contrary to label instructions or under conditions not 

reasonably foreseeable to or beyond the control of Seller or SYNGENTA, and (2) Buyer 

and User assume the risk of any such use. TO THE EXTENT PERMITTED BY 

APPLICABLE LAW, SYNGENTA MAKES NO WARRANTIES OF MERCHANTABILITY 

OR OF FITNESS FOR A PARTICULAR PURPOSE NOR ANY OTHER EXPRESS OR 

IMPLIED WARRANTY EXCEPT AS WARRANTED BY THIS LABEL. 

To the extent permitted by applicable law, in no event shall SYNGENTA be liable for 

any incidental, consequential or special damages resulting from the use or handling of 

this product. TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE 

EXCLUSIVE REMEDY OF THE USER OR BUYER, AND THE EXCLUSIVE LIABILITY 

OF SYNGENTA AND SELLER FOR ANY AND ALL CLAIMS, LOSSES, INJURIES 

OR DAMAGES (INCLUDING CLAIMS BASED ON BREACH OF WARRANTY, 

CONTRACT, NEGLIGENCE, TORT, STRICT LIABILITY OR OTHERWISE) 

RESULTING FROM THE USE OR HANDLING OF THIS PRODUCT, SHALL BE THE 

RETURN OF THE PURCHASE PRICE OF THE PRODUCT OR, AT THE ELECTION 

OF SYNGENTA OR SELLER, THE REPLACEMENT OF THE PRODUCT.

SYNGENTA and Seller offer this product, and Buyer and User accept it, subject to the 

foregoing Conditions of Sale and Limitation of Warranty and Liability, which may not be 

modified except by written agreement signed by a duly authorized representative of 

SYNGENTA. 
Ascernity 

Page 6

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. 

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. Keep children and pets out of the treated area until sprays 

have dried. 

PRODUCT INFORMATION

Ascernity is a broad-spectrum product containing two fungicides. It has preventative, 

systemic and curative properties. Ascernity provides excellent disease control of many 

major turfgrass diseases. Ascernity may be applied as a foliar spray and integrated into 

a resistance management program. All applications should be made according to the 

use directions that follow. 

USE RESTRICTIONS AND PRECAUTIONS 

DO NOT apply more than 2.0 fl oz of Ascernity per 1,000 sq ft per year (88 fl oz 

ascernity per acre per year). 

DO NOT apply within 15 feet of any golf course water body. 

DO NOT apply by air. 

DO NOT apply through irrigation systems (chemigation). 

DO NOT spray when conditions favor drift beyond area intended for application. 

Conditions which may contribute to drift include thermal inversion, wind speed and 

direction, sprayer nozzle/pressure combinations, spray droplet size, etc. Contact your 

State extension agent for spray drift prevention guidelines in your area. 

AVOIDING SPRAY DRIFT IS THE RESPONSIBILITY OF THE APPLICATOR.
Ascernity 

Page 7

USE INFORMATION 

Application: Thorough coverage is necessary to provide good disease control. Make 

no more spray solution than is needed for application. For control of foliar diseases, 

allow Ascernity to completely dry prior to irrigating. For control of soil borne diseases 

Ascernity can be watered in after application. 

Adjuvants: When an adjuvant is to be used with this product, Syngenta recommends 

the use of a Chemical Producers and Distributors Association certified adjuvant. 

Efficacy: Under certain conditions conducive to extended infection periods, use 

another registered fungicide for additional applications if the maximum amount of 

Ascernity has been used. If isolates resistant to Group 3 or Group 7 fungicides are 

present, efficacy can be reduced for certain diseases. The higher rates in the rate 

range and/or shorter spray intervals may be required under conditions of heavy infection 

pressure with highly susceptible varieties, or when environmental conditions are 

conducive to disease. 

Integrated Pest Management (IPM): Ascernity should be integrated into an overall 

disease and pest management strategy whenever the use of a fungicide is required. 

Sound turf management resulting in healthy, vigorous turf is the foundation of a good 

IPM program. Cultural practices such as proper choice of turf variety, nutrient 

management, proper cutting height, thatch management, and proper watering, 

drainage, and moisture stress management should be integrated with the use of 

fungicides to increase turf vigor and reduce the susceptibility to disease. Immunoassay 

detection kits and extension service diagnostic services can assist in the early and 

accurate identification of causal organisms and corresponding selection of the proper 

fungicide when required. 

Resistance Management 

Ascernity contains two fungicides – benzovindiflupyr, an SDHI fungicide in Group 7 and 

difenoconazole, a triazole fungicide in Group 3. Fungal pathogens can develop 

resistance to products with the same mode of action when used repeatedly. Because 

resistance development cannot be predicted, use of this product should conform to 

resistance management strategies established for the crop and use area. Consult your 

local or State agricultural authorities for resistance management strategies that are 

complementary to those in this label. Resistance management strategies may include 

rotating with products having different modes of action or limiting the total number of 

applications per season. Syngenta encourages responsible resistance management to 

ensure effective long-term control of the fungal diseases on this label. Ascernity should 

not be alternated or tank mixed with any fungicide to which resistance has already 

developed. 

Some turf disease pathogens are known to have developed resistance to products used 

repeatedly for their control. Ascernity should be alternated with other registered 
Ascernity 

Page 8

fungicides that have a different mode of action and to which pathogen resistance has 

not developed. Since Ascernity is an SDHI fungicide (Group 7 fungicide) and a DMI 

fungicide (Group 3 fungicide), avoid alternation with other SDHI and DMI fungicides. 

Turfgrass Tolerance: Ascernity plant tolerance has been found to be safe for all 

turfgrass species on the label; however, not all possible tank-mix combinations have 

been tested under all conditions. When possible, test the combinations on a small 

portion of the turf to ensure that a phytotoxic response will not occur as a result of 

application. 

Spray Drift Management: To avoid spray drift, do not apply when conditions favor drift 

beyond the target area. The interaction of many equipment- and weather-related 

factors determines the potential for spray drift. AVOIDING SPRAY DRIFT AT THE 

APPLICATION SITE IS THE RESPONSIBILITY OF THE APPLICATOR AND THE 

GROWER. 

MIXING AND APPLICATION METHODS 

Spray Equipment 

Nozzles

x Equip sprayers with nozzles that provide accurate and uniform application. 

x Nozzles should be the same size and uniformly spaced across the boom. 

x Calibrate sprayer before use. 

x It is suggested that screens be used to protect the pump and to prevent nozzles 

from clogging. 

x Screens placed on suction side of pump should be 16-mesh or coarser. 

x Do not place a screen in the recirculation line. 

x Use 50-mesh or coarser screens between the pump and boom, and where 

required, at the nozzles. 

x Check nozzle manufacturer’s recommendations. 

Pump 

x Use a pump with capacity to: 

1. Maintain 35-40 psi at nozzles. 

2. Provide sufficient agitation in tank to keep mixture in suspension - this 

requires recirculation of 10% of tank volume per minute. 

x Use a jet agitator or liquid sparge tube for agitation. 

x Do not air sparge. 

For more information on spray equipment and calibration, consult sprayer 

manufacturers and state recommendations. For specific local directions and spray 

schedules, consult the current state agricultural recommendations. 
Ascernity 

Page 9

Mixing Instructions 

To prepare spray solution, partially fill the spray tank with clean water and begin 

agitation. Add the specified amount of Ascernity to the tank, allowing time for good 

dispersion, then add an adjuvant, if recommended. If tank mixes are required, product 

should be added to the spray tank in the following order: WG or dry flowable 

formulations, wettable powders and flowable (aqueous suspensions) products. Finish 

filling the tank to the desired volume to obtain the proper spray concentration. Maintain 

agitation throughout the spraying operation. Do not allow spray mixture to stand 

overnight or for prolonged periods. Make up only the amount of spray required for 

immediate use. Sprayers should be thoroughly cleaned immediately after application. 

Do not use silicone based products with Ascernity due to possible phytotoxicity. 

If spray-tank mixture is unsprayed for more than 18 hours (overnight), re-suspend 

product with agitation for 20 minutes.

x Ascernity is an SL (Soluble Liquid) formulation. 

x Prepare no more spray mixture than is required for the immediate operation. 

x Thoroughly clean spray equipment before using this product. 

x Agitate the spray solution before and during application. 

x Rinse spray tank thoroughly with clean water after each day’s use and dispose of 

pesticide rinsate by application to an already treated area. 

Ascernity Alone (No Tank Mix)

x Add 1⁄2-Ҁ of the required amount of water to the spray or mixing tank. 

x With the agitator running, add Ascernity to the tank. 

x Continue agitation while adding the remainder of the water. 

x Begin application of the spray solution after Ascernity has completely dispersed 

into the mix water. 

x Maintain agitation until all of the mixture has been sprayed. 

Ascernity + Tank Mixtures: Ascernity is usually compatible with many tank-mix 

partners registered for use on turf. 

If tank mixes are desired, observe all directions, precautions, and limitations on labeling 

of all products used. Consult compatibility charts or your local or state turf authority for 

compatibility information. Do not combine Ascernity in the spray tank with pesticides, 

surfactants, or fertilizers; unless compatibility charts or your own prior use has shown 

that the combination is physically compatible, effective, and non-injurious under your 

conditions of use. 

To determine the physical compatibility of Ascernity with other products, use a jar test. 

Using a quart jar, add the proportionate amounts of the products to 1 qt. of water. Add 

wettable powders and water dispersible granular products first, then liquid flowables, 

and emulsifiable concentrates last. After thoroughly mixing, let stand for at least 5 

minutes. If the combination remains mixed or can be remixed readily, it is physically 
Ascernity 

Page 10

compatible. Once compatibility has been proven, use the same procedure for adding 

required ingredients to the spray tank. 

Mixing in the Spray Tank 

x Add 1⁄2-Ҁ of the required amount of water to the spray or mixing tank. 

x With the agitator running, add the tank-mix partner(s) into the tank in the same 

order as described above. 

x Allow the material to completely dissolve and disperse into the mix water. 

Continue agitation while adding the remainder of the water and Ascernity to the 

spray tank. 

x Allow Ascernity to completely disperse. 

x Spray the mixture with the agitator running. 

Application Instructions 

Ascernity may be applied with all types of spray equipment commonly used for making 

ground applications. Proper adjustments and calibration of spraying equipment to give 

good coverage is essential for good disease control. 

Ground Application 

x Apply in sufficient water to provide good coverage. Typical application volumes 

range from 30 to 175 gallons of spray per acre. 

x Thorough coverage is necessary to provide good disease control. 

 
Ascernity 

Page 11

SPECIFIC USE DIRECTIONS 

Ascernity controls certain pathogens causing foliar, stem, and root diseases, including 

leaf and stem blights, leaf spots, patch diseases, mildews, anthracnose, fairy rings, 

molds, and rusts. 

Target Diseases 

Use Rate 

(fl oz 

product 

per 1000 sq 

ft)

Use Rate

(fl oz 

product 

per acre) 

Application

Interval 

(days) 

Remarks* 

Anthracnose 

 (Colletotrichum 

cereale)

0.75 to 1.0 33-44 14 Use preventatively. Begin 

applications when conditions are 

favorable for disease infection, prior to 

disease symptom development. For 

optimum disease control tank mix or 

alternate Ascernity with a contact 

fungicide such as Daconil Action, 

Daconil Weatherstik or Daconil Ultrex. 

Brown Patch 

(Rhizoctonia solani)

0.75 to 1.0 33-44 14-21 Apply when conditions are favorable 

for disease development. 

Large patch / zoysia 

patch (Rhizoctonia 

solani)

0.75 to 1.0 33-44 14-21 For large patch of all warm-season 

turfgrasses, make 1 or 2 applications 

in fall prior to infection or when 

conditions are favorable for infection. 

A spring application during green-up 

may be required based on length of 

the infection period. Initiate first 

application for large patch/zoysia 

patch when soil temperature at a 2 – 

4” depth average 65°F. 

Leaf and Sheath 

Spot (Rhizoctonia 

zeae, Waitea 

circinata var. zeae) 

1.0 44 14-21 For Leaf and Sheath Spot, apply 

when conditions are favorable for 

infection. Curative control may 

necessitate several applications, use 

higher rates and shorter intervals for 

curative control. Target spray 

applications at crown of turfgrass. 

Brown Ring Patch 

 Waitea circinata 

var. circinata

1.0 44 14-21 Apply when conditions are favorable 

for disease development. 

Cool Weather Brown 

Patch, Yellow Patch 

(Rhizoctonia 

cerealis)

1.0 44 14-21 Make 1 or 2 applications in fall or 

when conditions are favorable for 

disease development. 

Dollar Spot 

 (Sclerotinia 

homoeocarpa)

1.0 44 14-21 Apply preventatively when conditions 

are favorable for disease 

development. For optimum disease 

control alternate or tank mix Ascernity 

with a contact fungicide such as like 

Daconil Action or Secure. 
Ascernity 

Page 12

Target Diseases 

Use Rate 

(fl oz 

product 

per 1000 sq 

ft)

Use Rate

(fl oz 

product 

per acre) 

Application

Interval 

(days) 

Remarks* 

Fairy Ring 

 (Lycoperdon 

spp.,Arachnion 

spp., Bovista spp., 

Vascellum spp., 

and Agrocybe 

pediades) 

1.0 44 14-28 For preventative control of fairy ring, 

apply early in the Spring prior to the 

development of symptoms. Apply in 2-

4 gallons water per 1,000 sq ft. 

Irrigate into the thatch prior to the 

spray drying. Repeat the application 

within 14 – 28 days after first 

application. 

For curative control, apply as soon as 

possible after fairy ring symptoms 

develop. Apply in 2-4 gallons water 

per 1000 sq ft, irrigate lightly after 

application. Add the specified rate of 

a wetting agent to the final spray. 

Severely damaged or thin turf may 

require reseeding. Fairy ring 

symptoms may take 2 to 3 weeks to 

disappear following application. If the 

area is hydrophobic use wetting 

agents and irrigate prior to 

application(s) of Ascernity. 

Reapplication after 28 days may be 

required in some cases. 

Snow mold 

Gray 

 (Typhula spp.) 

Pink 

(Microdochium 

 nivale) 

1.0 44 Late fall Apply one application in the late fall 

before snow cover. Do not apply on 

top of snow. For optimum disease 

control tank mix with a fungicide from 

a different FRAC group such as 

Daconil, Secure or Medallion. 

Microdochium Patch 

 (Microdochium 

nivale) 

1.0 44 14 Use preventatively. Begin 

applications when conditions are 

favorable for disease infection, prior to 

disease symptom development. 

Gray Leaf Spot** 

(Pyricularia grisea) 

1.0 44 14 Use Ascernity in a preventative 

disease control program. Begin 

applications before disease is present 

and alternate with other fungicide 

chemistries that control gray leaf spot. 

Copper Spot 

(Gloeocercospora 

sorghi) 

1.0 44 14 Use Ascernity in a preventative 

disease control program. Begin 

applications before disease is present 

and alternate with other fungicide 

chemistries that control copper spot. 

Leaf Rust 

Stem Rust 

Stripe Rust 

 (Puccinia spp.)

1.0 44 14-21 Begin applications when conditions 

are favorable for disease infection, 

prior to disease symptom 

development. 

Leaf Spot 

 (Bipolaris 

sorokiniana, 

Bipolaris

cynodontis, 

Bipolaris spp.)

1.0 44 14 Apply when conditions are favorable 

for disease development. 
Ascernity 

Page 13

Target Diseases 

Use Rate 

(fl oz 

product 

per 1000 sq 

ft)

Use Rate

(fl oz 

product 

per acre) 

Application

Interval 

(days) 

Remarks* 

Melting Out 

 (Drechslera poae) 

1.0 44 14 Apply when conditions are favorable 

for disease development 

Necrotic Ring Spot 

(Ophiosphaerella 

korrae) 

1.0 44 14 Apply when conditions are favorable 

for disease development. 

Pink Patch 

(Limonomyses 

roseipellis) 

1.0 44 14 Apply when conditions are favorable 

for disease development. 

Powdery Mildew 

 (Erysiphe graminis) 

0.5 to 1.0 22-44 14 to 21 Begin applications when conditions 

are favorable for disease infection, 

prior to disease symptom 

development. 

Red Thread 

 (Laetisaria 

fuciformis) 

1.0 44 14 Apply when conditions are favorable 

for disease development. 

Southern Blight 

(Sclerotium rolfsii) 

1.0 44 14 Apply when conditions are favorable 

for disease development. 

Summer Patch 

 (Magnaporthe 

poae) 

1.0 44 14 Initiate applications when soil 

temperatures reach 65°F at a 2 inch 

soil depth. 

Take-all Patch 

 (Gaeumannomyces 

graminis var.

avenae) 

1.0 44 14 Begin applications prior to disease 

symptom development. Make two 

applications 28 days apart in the 

spring and two applications 28 days 

apart in the fall. 

Spring Dead Spot 

(Ophiospharella 

korrae, O. 

herpotricha) 

1.0 44 14-28 Apply 1 or 2 applications 

approximately one month prior to 

bermudagrass dormancy. 1/8" to 1/4" 

of irrigation directly after application is 

recommended. Reapply 14 to 28 

days later. 

Algae 1.0 44 14 For optimum control of algae 

Ascernity should be tank mixed or 

alternated with a fungicide containing 

Daconil such as Daconil Action, 

Daconil WeatherStik, Daconil Ultrex, 

Concert or Renown. 

 *Do not apply more than 2.0 fl oz Ascernity per 1,000 square feet per year (88 fl oz Ascernity per acre per year). 

**Do not make more than two sequential applications of Ascernity for control of Gray Leaf Spot. For all other 

diseases when Gray Leaf Spot is not present, do not make more than three sequential applications of Ascernity. 

One gallon (128 fl oz) Ascernity contains 0.20 lb benzovindiflupyr and 0.66 lb difenoconazole. 
Ascernity 

Page 14

Ascernity: Rate Conversion Chart for Turf 

Product Conversion Table 

Fl oz product/1000 sq ft Fl oz Product Per Acre Maximum Yearly 

Applications

0.5 22 4 

0.75 33 2 

1.0 44 2 

STORAGE AND DISPOSAL 

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

Pesticide Storage 

Store in original container only. Store in a cool, dry and well-ventilated place. Protect 

from excessive heat. Keep container closed when not in use. Do not store near food or 

feed. 

Pesticide Disposal 

Pesticide wastes may be toxic. Improper disposal of unused pesticide, spray mixture, 

or rinse water is a violation of federal law. If these wastes cannot be used according to 

label instructions, contact your State Pesticide or Environmental Control Agency, or the 

Hazardous Waste representative at the nearest EPA Regional Office for guidance in 

proper disposal methods. 

Container Handling [less than or equal to 5 gallons] 

Non-refillable 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 puncture and dispose of in a sanitary 

landfill, or by incineration, or by other procedures approved by state and local 

authorities. 

Container Handling [greater than 5 gallons – mini-bulk] 

Non-refillable 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. Fill the container 1⁄4 full with water. 

Replace and tighten closures. Tip container on its side and roll it back and forth, 

ensuring at least one complete revolution, for 30 seconds. Stand the container on its 

end and tip it back and forth several ties. Turn the container over onto its other end and 
Ascernity 

Page 15

tip it back and forth several times. Empty the rinsate into application equipment or a mix 

tank or store rinsate for later use or disposal. Repeat this procedure two more times. 

Then offer for recycling if available or puncture and dispose of in a sanitary landfill, or by 

incineration, or by other procedures approved by state and local authorities. 

Container Handling [greater than 5 gallons – bulk] 

Refillable container. Refill this container with pesticide only. Do not use this container 

for any other purpose. Cleaning the container before final disposal is the responsibility 

of the person disposing of the container. Cleaning before refilling is the responsibility of 

the person refilling. To clean container before final disposal, empty the remaining 

contents from this container into application equipment or mix tank. Fill the container 

about 10 percent full with water. Agitate vigorously or recirculate water with the pump 

for 2 minutes. Pour or pump rinsate into application equipment or rinsate collection 

system. Repeat this rinsing procedure two more times. Then offer for recycling if 

available or puncture and dispose of in a sanitary landfill, or by incineration, or by other 

procedures approved by state and local authorities. 

CONTAINER IS NOT SAFE FOR FOOD, FEED, OR DRINKING WATER. 

AscernityTM, Concert®, Daconil ActionTM, Daconil Ultrex®, Daconil Weatherstik®, 

Medallion®, RenownTM are trademarks of a Syngenta Group Company. 

Viton® is a trademark of E. I. DuPont de Nemours & Co., Inc. 

SecureTM is a trademark of ISK Biosciences Corporation. 

©20__ Syngenta 

For non-emergency (e.g., current product information), call 

Syngenta Crop Protection at 1-800-334-9481 

Manufactured for: 

Syngenta Crop Protection, LLC 

P.O. Box 18300 

Greensboro, North Carolina 27419-8300 

Ascernity – pd – 11/16/12 (pl – 11/19/12) 

000100.XXXXX.20121126.Ascernity_New.pdf 

Ascernity NEW NOV2012-Version B-Hilite – pl – 7/7/15 

000100-0RUTT.20121126B.ASCERNITY_NEW_NOV2012-HI.pdf 

Ascernity NEW NOV2012-Version C-Hilite – pl – 8/27/15 

000100-0RUTT.20150827C.ASCERNITY.NEW.NOV2012.HI.pdf 

Ascernity NEW NOV2012-Version C-Clean – pl – 8/27/15 

000100-0RUTT.20150827C.ASCERNITY.NEW.NOV2012.pdf