1

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY

WASHINGTON, DC 20460

OFFICE OF 

PREVENTION, PESTICIDES AND 

TOXIC SUBSTANCES

PC Code: 128997

DP Barcodes: DP362764

Date: 11/12/2009

MEMORANDUM

Subject: Evaluation of Potential Ecological Risks from the Proposed New Use of 

Tebuconazole on Fruiting Vegetables (Crop Group 8).

To: Mary Waller, Risk Manager

Tracy Keigwin, Risk Manager Reviewer

Registration Division (7505P)

From: Christopher Koper, Chemist

Anita Ullagaddi, Environmental Protection Specialist

Joseph Chisholm, Environmental Protection Specialist 

Nancy Andrews, Chief

Brian Anderson, RAPL

Environmental Risk Branch I

Environmental Fate and Effects Division (7507P)

Attached is the Environmental Fate and Effects Division’s (EFED’s) ecological risk assessment 

for the proposed Section 3 registration for the use of the fungicide tebuconazole on fruiting 

vegetables (crop group 8, Eggplant, groundcherry, pepino, pepper, tomatillo, tomato). 
2

1. Executive Summary

This assessment evaluates the proposed use of tebuconazole on fruiting vegetables. The 

following commodities are included in the fruiting vegetables crop group:

Eggplant; groundcherry (Physalis spp); pepino; pepper (includes bell pepper, chili pepper, 

cooking pepper, pimento, sweet pepper); tomatillo; tomato

Previous Section 3 assessments on new uses of tebuconazole have identified direct risks to 

mammals, fish, terrestrial and aquatic plants, and saltwater invertebrates (DP333331, 2007). 

The current assessment evaluates proposed uses of tebuconazole with equivalent application 

rates and seasonal loads as previous assessments. The proposed maximum single application 

rate is 0.225 lbs a.i./Acre; six applications are allowed with seven days between applications 

for a maximum seasonal application rate of 1.35 lbs a.i./Acre. Potential risks to non-target 

organisms identified in this assessment are summarized in Table 1 and are similar to those 

identified in previous assessments, although chronic RQs for birds also exceeded the chronic 

LOC. 

This assessment identified direct risks to fish, saltwater invertebrates, birds, mammals, and 

terrestrial plants and identified indirect risks to organisms that may depend on them for 

sustenance. These conclusions are similar to conclusions presented in previous assessments.

Table 1. Summary of LOC Exceedances for the Proposed New Uses of Tebuconazole Use on 

Fruiting Vegetables

Effect

Taxonomic Group

Birds Mammals Terrest.

Plants

Terrest. 

Inverts

FW 

and 

SW 

Fish

FW 

Invert 

SW

Invert

Aquatic 

Plants

Direct Effect LOC 

Exceedance

√ √ √ -- √ -- √ --

Indirect Effect 

Potential

√ √ √ √ √ √ √ √

Data Gaps 

Since the 2007 assessment was conducted, submission of an acute oral toxicity study on a 

passerine species was included in the Part 158 data requirements. Therefore, a data gap exists for 

the acute oral study in a passerine species. In addition, EFED has identified issues with the 

terrestrial plant toxicity studies. A submitted Tier I seedling emergence and vegetative vigor 

study (MRID 458213-01) was classified as supplemental because the product was not tested at 

the maximum (single application) label use rate. The concentration tested was 0.404 lb a.i./acre, 

while Folicur 3.6F is registered for use on dry bulb vegetables to control white rot at a maximum 

single application rate of 0.564 lb a.i./acre (EPA Reg. No. 265-752, stamped June 17, 2009). 

While this current action proposes a single application rate of 0.225 lb a.i./acre and, therefore, 

the aforementioned study would satisfy data requirements, EFED recognizes a Tier I seedling 

emergence and vegetative vigor study using the rate of 0.564 lb a.i./acre as a data gap for certain 
3

uses that have already been registered. Pending the results of a new Tier I study, it may be 

possible to upgrade the submitted Tier II studies (MRID 458213-02, 472992-01) to an acceptable 

status. 

2. Scope of Assessment 

Tebuconazole is a sterol demethylation inhibitor (DMI) fungicide. It is systemic and shows 

activity against rusts, white rot, powdery mildew, and Cercospora leaf spot. Tebuconazole 

provides protective activity by preventing completion of the infection process. It is rapidly 

absorbed by plants and is translocated systemically in the young growing tissues. 

The previous risk assessment (DP333331, 2007 - brassica leafy vegetables, garden beets, green 

onions, dry bulb vegetables) evaluated applications that are similar to those proposed for fruiting 

vegetables. An abbreviated review was conducted by EFED for the following reasons:

• Proposed application rates, intervals, and seasonal loads are within the range of 

previously approved application rates; and

• No new exposure methods have been approved for standard risk assessments since the 

previous risk assessment was performed in 2007.

A new terrestrial plant seedling emergence toxicity study (OPPTS 850.4225) has been submitted 

and was reviewed for this assessment (MRID 472992-01). Results of this study were 

incorporated into the risk assessment. No other new data were reviewed for this assessment.

3. Exposure Assessment

3.1 Proposed Tebuconazole Application Information 

Table 2 shows the proposed application rate for fruiting vegetables based on the submitted label

dated December 15, 2008. The proposed Folicur® 3.6F use is labeled for foliar spray

applications using aerial and ground equipment. The proposed application rate is 6 applications 

of 0.225 lb a.i./acre applied at 7-day intervals. This rate is equivalent to the highest application 

rate for previously registered pome and stone fruit uses (DP316942, 2006). 

Table 2. Proposed Tebuconazole Use

Proposed Label Use Method 1 Application Rate 2

(Interval)

Folicur® 3.6F

Fruiting Vegetables (Crop Group 8)

Eggplant

Groundcherry

Pepino

Pepper

Tomatillo

Tomato

A – foliar 6 apps @ 0.225 lb a.i./acre

(7-day interval)

G – foliar 6 apps @ 0.225 lb a.i./acre

(7-day interval)

1 A = aerial application. G = ground application. All applications are liquid unless otherwise specified. 
4

Table 2. Proposed Tebuconazole Use

Proposed Label Use Method 1 Application Rate 2

(Interval) 2 (3.6 lbs. a.i./gallon) (gallon/128 fl. oz.)(8 fl. oz./acre) = 0.225 lbs. a.i./acre

3.2 Aquatic Exposure Modeling for Tebuconazole

The aquatic exposure concentrations presented in this assessment were solely based on modeling 

estimates. No surface and limited (less than detection limit) groundwater monitoring data are 

available for tebuconazole. To simulate surface water exposure for the ecological risk 

assessment, the Tier II PRZM/EXAMS model was used. 

3.2.1 PRZM-EXAMS Model 

The Pesticide Root Zone Model (PRZM, Carsel et al., 1997) and the Exposure Analysis

Modeling System (EXAMS, Burns, 1997) with the standard pond scenario were used to generate 

aquatic estimated environmental concentrations (EECs). PRZM (v3.12.2, May 12, 2005) 

simulates fate and transport on the agricultural field whereas EXAMS (v2.98.04.06, April 25, 

2005) simulates the fate and resulting daily concentrations in the water body. Simulations are 

carried out with the linkage program shell, PE5.pl (PE5, PE Version 5.0, November 15, 2006), 

which incorporates pepper and tomato scenarios developed by EFED. Simulations are run for 

multiple (usually 30) years, and the EECs represent peak values that are expected once every ten 

years based on the 30 years of daily values generated during the simulation. Additional 

information on these models can be found at: 

http://www.epa.gov/oppefed1/models/water/index.htm.

The aquatic exposure is estimated for the maximum application pattern to a 10-ha field bordering 

a 1-ha pond, 2-m deep (20,000 m3) with no outlet. Exposure estimates generated using this 

standard pond are intended to represent a wide variety of vulnerable water bodies that occur at 

the top of watersheds including prairie pot holes, playa lakes, wetlands, vernal pools, man-made 

and natural ponds, and intermittent and first-order streams. As a group, there are factors that 

make these water bodies more or less vulnerable than the standard surrogate pond. Static water 

bodies that have larger ratios of pesticide-treated drainage area to water body volume would be 

expected to have higher peak EECs than the standard pond. These water bodies will be either 

smaller in size or have large drainage areas. Smaller water bodies have limited storage capacity 

and thus may overflow and carry pesticide in the discharge, whereas the standard pond has no 

discharge. As watershed size increases beyond 10-ha, it becomes increasingly unlikely that the 

entire watershed is planted with a non-major single crop that is all treated simultaneously with 

the pesticide. For major crops like cereal grains, however, this may not be the case. Headwater 

streams can also have peak concentrations higher than the standard pond, but they likely persist 

for only short periods of time and are then carried and dissipated downstream.

OPP standard PRZM crop scenarios, which consist of location-specific soils, weather, and 

cropping practices, were used in the simulations to represent proposed labeled uses of 

tebuconazole. These scenarios were developed to represent high-end exposure sites in terms of 
5

vulnerability to runoff and erosion and subsequent off-site transport of pesticide. Tebuconazole

is being proposed for fruiting vegetables (crop group 8). OPP standard PRZM scenarios for the 

proposed uses that were modeled include Florida pepper and Florida, Pennsylvania, and 

California tomato. A summary of the input parameters used to estimate tebuconazole

concentrations in the aquatic systems for ecological risk assessment are listed in Table 3.

Table 3. PRZM/EXAMS Input Parameters for Tebuconazole. 

Input Parameter Value Comment Source

Scenario: Fruiting Vegetables (Crop Group 8):

Pepper: FL Pepper

Tomato: CA Tomato

 PA Tomato

 FL Tomato

All available scenarios for each use N/A1

Maximum Single 

Application Rate:

lbs a.i./A (kg a.i./ha)

Fruiting Vegetables (all scenarios): 

0.225 (0.253) 2

Product label states 3.6 lbs 

a.i./gallon and application rate as 8 

fl. oz. per acre

Product label: Folicur® 3.6F 

EPA Reg. No. 264-752

Maximum Number of 

Applications (season):

Fruiting Vegetables (all scenarios): 

6

Label specifies rates per season. If 

crops are rotated with those on 

which tebuconazole is used, yearly 

rates on a given field may be 

higher. 

Product label: Folicur® 3.6F 

EPA Reg. No. 264-752

Application Interval (days) Fruiting Vegetables (all scenarios): 

7

Intervals were selected to reflect 

labeled application patterns.

Product label: Folicur® 3.6F 

EPA Reg. No. 264-752

Application Method: Foliar: aerial 

 ground

Foliar application may be made 

using aerial and/or ground

equipment

Product label: Folicur® 3.6F 

EPA Reg. No. 264-752

Initial Application Date:

(day-month)

Fruiting Vegetables:

Pepper: FL Pepper: 20-10

Tomato: CA Tomato: 21-07

 PA Tomato: 03-09

 FL Tomato: 03-04

Initial application date based on the 

Pre-harvest Interval of 7 days and 6 

applications (42 days before 

harvest)

Crop Scenarios

CAM Input Fruiting Vegetables (all scenarios):

2

Foliar applications (aerial/ground) PE5 User’s Manual

IPSCND Input Fruiting Vegetables (all scenarios): 

3

Remaining pesticide on foliage is 

retained as surface residue and 

continues to decay.

PE5 User’s Manual

Application Efficiency Aerial: 0.95

Ground: 0.99

Default values for foliar spray Guidance for Selecting 

Input Parameters in 

Modeling the 

Environmental Fate and 

Transport of Pesticides; Feb 

28, 2002

Spray Drift Fraction Aerial: 0.05

Ground: 0.01

Default values for foliar spray Guidance for Selecting 

Input Parameters in 

Modeling the 

Environmental Fate and 

Transport of Pesticides; Feb 

28, 2002

Molecular Weight (g/mol) 308 Product chemistry data N/A1

Henry’s Law Constant at 20°C 

(atm-m3/mol)

1.24 x 10-10 Calculated D269918
6

Table 3. PRZM/EXAMS Input Parameters for Tebuconazole. 

Input Parameter Value Comment Source

Vapor Pressure at 20°C

(mm Hg)

1.3 x 10-8 Product chemistry data MRID (GLN 63-9)

Solubility in Water at 20oC 

(mg/L) 2

32 Product chemistry data MRID (GLN 63-7)

Organic Carbon Partition 

Coefficient (KOC) (mL/g)

1023 Represents the average KOC MRIDs: 40995922 and 

40700960 (GLN 163-1)

Hydrolysis:

Half-life (days)

0 (stable) Stable at pH 5, 7, 9 MRID 40700957 (GLN 

161-1)

Aqueous Photolysis

Half-life at pH 7 (days)

590 Calculated MRID 40700958 (GLN 

161-2)

Aerobic Aquatic Metabolism 

Half-life (days)

1592 Assumed 2 x aerobic soil 

metabolism half-life input value 

(MRID 40700959) because the 

compound is stable to hydrolysis 

and no aerobic aquatic metabolism 

data are available 

Guidance for Selecting 

Input Parameters in 

Modeling the 

Environmental Fate and 

Transport of Pesticides; Feb 

28, 2002

Anaerobic Aquatic 

Metabolism Half-life (days)

2126 Assumed 2 x anaerobic soil 

metabolism half-life input value 

(MRID 40700959) because the 

compound is stable to hydrolysis 

and no anaerobic aquatic 

metabolism data are available

Guidance for Selecting 

Input Parameters in 

Modeling the 

Environmental Fate and 

Transport of Pesticides; Feb 

28, 2002

Aerobic Soil Metabolism 

Half-life (days)

796 -- MRID 40700959 (GLN 

162-1) 

Anaerobic Soil Metabolism 

Half-life (days)

1063 -- MRID 40700959

Foliar Dissipation Rate 

PLDKRT

0.078 Calculated

Foliar half-lives ranged from 1.2 to 

8.4 days. The upper confidence 

bound on the mean metabolism 

half-life was 8.90 days. For 

calculation of PLDKRT input 

parameter refer to Appendix B.

MRID 46574201

1 N/A means not applicable. 2 (3.6 lbs. a.i./gallon)(gallon/128 fl. oz.)(8 fl. oz./acre) = 0.225 lbs. a.i./acre = 0.253 kg/ha 3 For modeling, the solubility value was multiplied by 10 for the input parameter.

3.2.2 Model Outputs: Aquatic Exposure Estimates

Maximum 1-in-10 year surface water EEC values derived from PRZM/EXAMS for each of the 

modeled crop scenarios are summarized in Table 4. In general, aerial applications of 

tebuconazole resulted in higher EECs compared to ground applications for Folicur® 3.6F.

Tebuconazole peak EEC levels for aerial applications ranged from 19.48 ppb for the CA tomato

scenario to 104.6 ppb for the FL Pepper scenario. For ground applications, peak EECs ranged 

from 5.49 ppb for the CA tomato scenario to 98.23 ppb for the FL Pepper scenario. 

PRZM/EXAMS output files are provided in Appendix A for the parent tebuconazole.
7

Table 4. Tebuconazole Estimated Environmental Concentrations (EECs) for Surface Water 

based on selected Crop Scenarios

Proposed Label 

Use

PRZM/EXAMS

Scenario

(first app date)

Method 1

Application Rate

(interval between 

applications)

Peak

EEC

(μg/L)

21-day

EEC

(μg/L)

60-day

EEC

(μg/L)

Folicur® 3.6F

Fruiting Vegetables

(Crop Group 8)

FL Pepper

(October 20 – foliar) A 6 app @ 0.225 lb a.i./acre

(7 days)

104.60 102.63 98.24

G 98.23 96.12 91.80

CA Tomato

(July 21 – foliar)

A

6 app @ 0.225 lb a.i./acre

(7 days)

19.48 19.19 18.76

G 5.49 5.41 5.33

PA Tomato

(September 03 – foliar) A 6 app @ 0.225 lb a.i./acre

(7 days)

70.48 69.67 68.76

G 56.21 55.39 54.24

FL Tomato

(April 03 – foliar) A 6 app @ 0.225 lb a.i./acre

(7 days)

101.00 98.94 96.65

G 94.91 92.45 90.21

Bold value denotes highest Estimated Environmental Concentrations (EECs)

1 For foliar applications, A = aerial application, G = ground application. All applications are liquid unless otherwise noted. 

3.3. Exposures to Terrestrial Organisms

Estimated residues on food items that may be consumed by bird and mammals were calculated

using T-REX, version 1.4.1. Inputs used in the modeling are presented in Table 5. A foliar 

dissipation half-life of 9.5 days was used based on available foliar dissipation data presented in 

Appendix B. Estimated residue levels on potential food items are presented in Table 6 for birds 

and Table 7 for mammals. 

Table 5. Inputs Used in T-REX

Chemical Name: Tebuconazole

 Use: Fruiting Vegetables

Application Rate (lbs/A): 0.225

Half-life (days): 9.5 (upper 95th percent confidence interval on the mean 

from values presented in Appendix B)

Application Interval (days): 7

Number of Applications: 6
8

Table 6. Avian Exposure Concentration Estimates for Tebuconazole Applications to 

Fruiting Vegetables (6 applications at 0.225 lb a.i./acre)

Feeding Category

Dietary-based 

EECs (mg/kgfood item)

Dose-based EECs (mg/kg-bw)

Small

(20 g)

Medium

(100 g)

Large

(1000 g)

Short grass 129 146.59 83.59 37.43

Tall grass 59 67.19 38.31 17.15

Broadleaf plants/small insects 72 82.46 47.02 21.05

Fruits/pods/seeds/large insects 8.0 9.16 5.22 2.34

Granivores - 2.04 1.16 0.52

Table 7. Mammalian Exposure Concentration Estimates for Tebuconazole 

Applications to Fruiting Vegetables (6 applications at 0.225 lb a.i./acre)

Feeding Category

Dietary-based 

EECs (mg/kgfood item)

Dose-based EECs (mg/kg-bw)

Small

(15 g)

Medium

(35 g)

Large

(1000 g)

Short grass 129 122.72 84.82 19.66

Tall grass 59 56.25 38.87 9.01

Broadleaf plants/small insects 72 69.03 47.71 11.06

Fruits/pods/seeds/large insects 8.0 7.67 5.30 1.23

Granivores - 1.70 1.18 0.27

4. Ecological Effects Summary

4.1. Submitted Ecotoxicity Studies

Toxicity data used to calculate RQs for tebuconazole are included in Tables 8 and 9. A new 

toxicity study that evaluated the effects of tebuconazole on the seedling emergence of terrestrial 

plants (MRID 472992-01) was received and reviewed since the last assessment. A seedling 

emergence endpoint for a dicot (tomato) from this newly submitted study is included in Table 9, 

below. All other toxicity data used in the current assessment has been previously reviewed and 

described (see D333331 for details). 
9

Table 8. Summary of Acute and Chronic Aquatic Toxicity Data Used in Risk 

Characterization

Species

Acute Toxicity Chronic Toxicity

EC/LC50

(μg ai/L)

Acute Toxicity 

Classification

(MRID)

NOAEC / 

LOAEC

(μg ai/L)

Affected

Endpoints

(MRID)

Rainbow Trout

Oncorhynchus 

mykiss

2270 Moderately toxic

(469192-04)

NOAEC = 12

LOAEC = 25

Early life stage test 

indicated reduced 

larval survival 

(407009-14)

Water flea

Daphnia magna

2880 Moderately toxic 

(469192-05)

NOAEC = 120

LOAEC = 230

Reduced adult length, 

survival, and young 

and adult reproduction

(407009-15)

Sheepshead minnow

Cyprinodon 

variegatus

5900 Moderately toxic 

(409959-04)

NOAEC = 21.9

LOAEC = 47.5

Reduced larval weight

(420382-02)

Eastern Oyster 

Crassostrea virginica

2700 Moderately Toxic

(409959-03)

-- --

Mysid shrimp

Americamysis bahia

490 Highly Toxic

(409959-02)

NOAEC = 35

LOAEC = 61

Reduced reproductive 

success 

(42039201)

Duckweed 

Lemna gibba

151.5 NOAEC = 34.2 Frond Density

(442469-01)

Green algae

Scenedesmus 

subspicatus

1450 NOAEC = 320 Cell dry weight

(409959-08)
10

Table 9. Summary of Acute and Chronic Terrestrial Toxicity Data used in Risk 

Assessment

Species

Acute Toxicity Chronic Toxicity

LD50 Acute Oral

Toxicity

(MRID)

LC50 Subacute 

Dietary 

Toxicity

(MRID)

NOAEC / 

LOAEC

Affected

Endpoints

(MRID)

Bobwhite quail 1988 

mg/kg 

bw

Slightly 

Toxic

407009-05

NOAEC = 

73.5 mg 

ai/kg-diet 

LOAEC = 

> 73.5 mg 

ai/kg-diet

No treatment related 

effects were 

observed at any test 

level (407009-10)

Mallard duck > 4815 

mg/kg 

diet

Slightly to 

practically 

non-toxic

407009-07

Laboratory rat 1615 mg 

ai/kg-bwt

Slightly 

Toxic 

(420900-06)

Laboratory rat NOAEC = 

300 mg 

ai/kg-diet 

LOAEC = 

1000 mg 

ai/kg-diet

decreased maternal 

and pup body weight, 

decreased pup 

viability

(407009-46)

Terrestrial Plants Seedling Emergence

Monocot (wheat): EC25 > 0.404 lb a.i./A, NOAEC < 0.404 lb a.i./A

Dicot (tomato): EC25 = 0.045 lb a.i./A, EC05 = 0.016 lb a.i./A*

Vegetative Vigor

Monocot (wheat): EC25 > 0.404 lb a.i./A, NOAEC < 0.404 lb a.i./A

Dicot (cucumber): EC25 > 0.404 lb a.i./A, NOAEC < 0.404 lb a.i./A

458213-01 (Tier I)

458213-02 (Tier II)

472992-01* (Tier II)

* The dicot endpoint is based on a study that was not previously used in risk assessment. 

Two studies that evaluated the acute risks to honeybees and earthworms are currently under 

review. 
11

4.2. Review of Incident Data 

Incident information from the Ecological Incident Information System (EIIS) database was 

available and indicated that seven incidents occurred in conjunction with the use of 

tebuconazole. One of these incidents resulted in a fish kill while the other six reported damage 

to wheat, soybean plants, and soybean seeds. Tebuconazole cannot be associated with these 

incidents with a great deal of certainty because environmental residue data were not reported at 

any of these sites. All events were rated “possible” on the certainty index as opposed to probable 

or highly probable and no residue analysis was available. 

One aquatic incident (incident # I007892-003) was reported in compliance with 6(a)2 regulations 

about a fish kill in Minnesota on June 25, 1998. An undetermined number of fathead minnows 

were killed along a long stretch of a creek adjacent to two wheat fields that had been treated (one 

by aircraft) with Folicur. This incident was rated as “possible” because of the low acute toxicity 

of tebuconazole to fish. In addition, no data with regard to application rates was available. 

Regarding the six incidents to terrestrial plants, one was the result of a “misuse” situation 

(incident # I015152-001) where a formulator added tebuconazole to a 790 gallon lot of a mixture 

of quintozene, thiabendazol, and captan on March 12, 2004. This created a formulation of an 

unregistered end-use product for a soybean seed treatment which was used by about 10 

commercial seed treating companies in IL, IN, OH, MI, and LA. Stunted growth was observed 

on May 21, 2004, and growers were consequently instructed to destroy their crops. Damage to 

about 1950 acres of soybeans from the use of tebuconazole in conjunction with unknown 

adjuvant(s) resulted plant stress and yellowing (incident # I016595-031, I0016595-032). 

Another incident with soybean occurred when damage was caused by high heat and the 

application of tebuconazole (incident # I0116737-021). Damage to spring wheat resulted from a 

reported “off label use” of tebuconazole (incident # I016662-021, I016662-022). Leaf and head 

malformation were observed.

5. Ecological Risks Summary

5.1. Terrestrial Organisms

RQs used to estimate potential risks to aquatic and terrestrial organisms are in Tables 10 to 14. 

Dose-based RQs exceeded LOCs for listed small birds consuming short grass for acute 

exposures (highest acute RQ = 0.10, Table 10) and for listed and non-listed small birds 

consuming short grass for chronic exposures (highest chronic RQ = 1.75, Table 12). 

Dose-based RQs did not exceed acute LOCs for any size class of mammal consuming any food 

item (Table 13). However, the chronic LOC was exceeded for small, medium, and large 

mammals consuming short grass and small and medium mammals consuming tall grass and 

broadleaf plants/small inesects (highest RQ = 3.72, Table 14). 

Reducing the number of applications to 2 (0.225 lbs a.i./Acre) with a 14-day application interval 

reduces RQs to below the LOC for birds. However, RQs would remain above the LOC for 

mammals. A single application at rates of 0.14 lbs a.i/Acre and lower would not result in LOC
12

exceedances for mammals. 

The LOC for listed and non-listed plants was also exceeded (Table 15) with an RQ of 3.52

and 1.25, respectively, for listed and non-listed species in semi-aquatic environments. 

Table 10. Upper Bound Kenaga, Acute Avian Dose-Based Risk Quotients

(6 Applications at 0.225 lbs a.i./Acre, 7-day Interval)

Size Class

(grams)

Adjusted

LD50

EECs and RQs

Short Grass Tall Grass

Broadleaf 

Plants/

Small Insects

Fruits/Pods/

Seeds/

Large Insects

Granivore

EEC RQ EEC RQ EEC RQ EEC RQ EEC RQ

20 1432 146.59 0.10* 67.19 0.05 82.46 0.06 9.16 0.01 2.04 <0.01

100 1823 83.59 0.05 38.31 0.02 47.02 0.03 5.22 <0.01 1.16 <0.01

1000 2575 37.43 0.01 17.15 0.01 21.05 0.01 2.34 <0.01 0.52 <0.01

*Exceeds acute ES LOC of 0.1

**Exceeds acute restricted use LOC of 0.2

***Exceeds acute LOC of 0.5

Table 11. Upper Bound Kenaga, Subacute Avian Dietary Based 

Risk Quotients

LC50

EECs and RQs

Short Grass Tall Grass

Broadleaf 

Plants/

Small Insects

Fruits/Pods/

Seeds/

Large Insects

EEC RQ EEC RQ EEC RQ EEC RQ

4815 128.71 0.03 58.99 0.01 72.40 0.02 8.04 <0.01

Table 12. Upper Bound Kenaga, Chronic Avian Dietary Based 

Risk Quotients

NOAEC (ppm)

EECs and RQs

Short Grass Tall Grass

Broadleaf 

Plants/

Small Insects

Fruits/Pods/

Seeds/

Large Insects

EEC RQ EEC RQ EEC RQ EEC RQ

74 128.71 1.75+ 58.99 0.80 72.40 0.99 8.04 0.11

+Exceeds chronic LOC of 1.0
13

Table 13. Upper Bound Kenaga, Acute Mammalian Dose-Based Risk Quotients

Size Class

(grams) Adjusted LD50

EECs and RQs

Short Grass Tall Grass

Broadleaf 

Plants/

Small 

Insects

Fruits/Pods/

Seeds/

Large 

Insects

Granivore

EEC RQ EEC RQ EEC RQ EEC RQ EEC RQ

15 3549.50 122.72 0.03 56.25 0.02 69.03 0.02 7.67 <0.01 1.70 <0.01

35 2871.92 84.82 0.03 38.87 0.01 47.71 0.02 5.30 <0.01 1.18 <0.01

1000 1242.19 19.66 0.02 9.01 0.01 11.06 0.01 1.23 <0.01 0.27 <0.01

Table 14. Upper Bound Kenaga, Chronic Mammalian Dose-Based Risk Quotients

Size Class

(grams) Adjusted NOAEL

EECs and RQs

Short Grass Tall Grass

Broadleaf 

Plants/

Small Insects

Fruits/Pods/

Seeds/

Large Insects

Granivore

EEC RQ EEC RQ EEC RQ EEC RQ EEC RQ

15 32.97 122.72 3.72+ 56.25 1.71+ 69.03 2.09+ 7.67 0.23 1.70 0.05

35 26.67 84.82 3.18+ 38.87 1.46+ 47.71 1.79+ 5.30 0.20 1.18 0.04

1000 11.54 19.66 1.70+ 9.01 0.78 11.06 0.96 1.23 0.11 0.27 0.02

+Exceeds chronic LOC of 1.0

Table 15. RQ values for plants in dry and semi-aquatic areas exposed to Tebuconazole

through runoff and/or spray drift.*

Plant Type Listed Status Dry Semi-Aquatic Spray Drift

Monocot non-listed <0.1 0.14 <0.1

Monocot listed <0.1 0.14 <0.1

Dicot non-listed 0.35 1.25* 0.25

Dicot listed 0.98 3.52* 0.70

*Exceeds LOC of 1.0

5.2. Aquatic Organisms

Aquatic RQs are summarized in Tables 16 and 17. Except for the aerial FL Pepper scenario 

freshwater fish acute RQ meeting the acute endangered species LOC (0.05), acute RQs did 

not exceed LOCs for freshwater or saltwater fish, aquatic plants, or freshwater invertebrates. 

However, acute RQs exceeded the acute restricted use LOC for saltwater invertebrates for all 

scenarios except both the ground and aerial CA Tomato scenario. Chronic RQs exceeded the 

LOC of 1.0 for all proposed uses for freshwater fish except the ground CA Tomato scenario.
14

Chronic RQs exceeded the LOC for saltwater fish and invertebrates for all scenarios except 

both the ground and aerial CA Tomato scenario.

Table 16. Freshwater Organism RQs for Tebuconazole

Proposed 

Label Use

PRZM/

EXAMS

Scenario Method

Acute RQs Chronic RQs

Peak

EEC

(μg/L)

Fish RQ

(LC50 = 

2270 

ug/L)

Invert. 

RQ 

(EC50 = 

2880 

ug/L)

Plant 

RQ

(EC50 = 

150 

ug/L)

21-day

EEC

(μg/L)

60-day

EEC

(μg/L)

Fish RQ

(NOAEC

= 12 

ug/L)

Invert. RQ

(NOAEC =

120 ug/L)

Fruiting 

Vegetables

(Crop 

Group 8)

FL 

Pepper

A 104.60 0.05* 0.04 0.07 102.63 98.24 8.19+ 0.86

G 98.23 0.04 0.03 0.65 96.12 91.80 7.65+ 0.80

CA 

Tomato

A 19.48 0.01 0.01 0.13 19.19 18.76 1.56+ 0.16

G 5.49 <0.01 <0.01 0.04 5.41 5.33 0.44 0.05

PA 

Tomato

A 70.48 0.03 0.02 0.47 69.67 68.76 5.73+ 0.58

G 56.21 0.02 0.02 0.37 55.39 54.24 4.52+ 0.46

FL 

Tomato

A 101.00 0.04 0.04 0.67 98.94 96.65 8.05+ 0.82

G 94.91 0.04 0.03 0.63 92.45 90.21 7.52+ 0.77

*Exceeds acute ES LOC of 0.05

+Exceeds chronic LOC of 1.0

Table 17. Saltwater Organism RQs for Tebuconazole

Proposed 

Label Use

PRZM/

EXAMS

Scenario Method

Acute RQs Chronic RQs

Peak

EEC

(μg/L)

Fish RQ

(LC50 =

5900

ug/L)

Invert. 

RQ 

(EC50 =

490

ug/L)

Oyster 

RQ 

(EC50 =

2700 

ug/L)

21-day

EEC

(μg/L)

60-day

EEC

(μg/L)

Fish RQ

(NOAEC =

22 ug/L)

Invert. RQ

(NOAEC =

35 ug/L)

Fruiting 

Vegetables

(Crop 

Group 8)

FL 

Pepper

A 104.60 0.02 0.21** 0.04 102.63 98.24 4.47+ 2.81+

G 98.23 0.02 0.20** 0.04 96.12 91.80 4.17+ 2.62+

CA 

Tomato

A 19.48 <0.01 0.04 0.01 19.19 18.76 0.85 0.54

G 5.49 <0.01 0.01 0.00 5.41 5.33 0.24 0.15

PA 

Tomato

A 70.48 0.01 0.14** 0.03 69.67 68.76 3.13+ 1.96+

G 56.21 0.01 0.11** 0.02 55.39 54.24 2.47+ 1.55+

FL 

Tomato

A 101.00 0.02 0.21** 0.04 98.94 96.65 4.39+ 2.76+

G 94.91 0.02 0.19** 0.04 92.45 90.21 4.10+ 2.58+

*Exceeds acute ES LOC of 0.05

**Exceeds acute restricted use LOC of 0.1

***Exceeds acute LOC of 0.5

+Exceeds chronic LOC of 1.0
15

6. Data Gaps

Since the 2007 assessment was conducted, submission of an acute oral toxicity study on a 

passerine species was included in the Part 158 data requirements. Therefore, a data gap exists for 

the acute oral study in a passerine species. In addition, EFED has identified issues with the 

terrestrial plant toxicity studies. A submitted Tier I seedling emergence and vegetative vigor 

study (MRID 458213-01) was classified as supplemental because the product was not tested at 

the maximum (single application) label use rate. The concentration tested was 0.404 lb a.i./acre, 

while Folicur 3.6F is registered for use on dry bulb vegetables to control white rot at a maximum 

single application rate of 0.564 lb a.i./acre (EPA Reg. No. 265-752, stamped June 17, 2009). 

While this current action proposes a single application rate of 0.225 lb a.i./acre and, therefore, 

the aforementioned study would satisfy data requirements, EFED recognizes a Tier I seedling 

emergence and vegetative vigor study using the rate of 0.564 lb a.i./acre as a data gap for certain 

uses that have already been registered. Pending the results of a new Tier I study, it may be 

possible to upgrade the submitted Tier II studies (MRID 458213-02, 472992-01) to an acceptable 

status. 

7. Endangered and Threatened Species

Table 18 summarizes the conclusions of potential concerns for direct and indirect effects to 

federally-listed threatened and endangered species (listed species). Also, LOCATES is used to 

identify listed species that may be located within the same county as the proposed new uses. 

Results of the LOCATES query are included in Appendix C. 

Table 18. Potential Effects to Federally Listed Taxa

Listed Taxa Direct Effects Indirect Effects

Terrestrial and semi-aquatic plants -

monocots No Yes (risks to pollinators such as birds and mammals and 

Terrestrial and semi-aquatic plants - dicots Yes other plants)

Terrestrial invertebrates No Yes (risks to terrestrial plants)

Birds Yes

Yes (risks to terrestrial plants, 

fish, aquatic invertebrates, 

birds and mammals)

Terrestrial phase amphibians Yes Yes (risks to terrestrial plants, 

birds, and mammals)

Reptiles Yes

Yes (risks to fish, aquatic 

invertebrates, terrestrial plants, 

birds, and mammals)

Mammals Yes

Yes (risks to terrestrial plants, 

birds, aquatic invertebrates, 

birds, and other mammals)

Aquatic vascular plants No Yes (risks to terrestrial plants, 

fish, and aquatic invertebrates)

Freshwater fish Yes

Yes (risks to terrestrial plants, 

aquatic invertebrates, other 

fish)

Aquatic phase amphibians Yes Yes (risks to terrestrial plants, 
16

Table 18. Potential Effects to Federally Listed Taxa

Listed Taxa Direct Effects Indirect Effects

aquatic invertebrates, other 

fish) 

Freshwater crustaceans Yes Yes (risks to terrestrial plants, 

fish, aquatic invertebrates)

Mollusks No Yes (risks to terrestrial plants, 

fish, aquatic invertebrates)

Marine/estuarine fish Yes

Yes (risks to terrestrial plants, 

aquatic invertebrates, other 

fish)

Marine/estuarine invertebrates Yes Yes (risks to terrestrial plants, 

fish, aquatic invertebrates)
17

Appendix A: PRZM/EXAM Outputs
18

stored as FLpepper aerial eco.out

Chemical: Tebuconazole

PRZM environment: FLpeppersSTD.txt modified Tueday, 26 August 2008 at 06:16:37

EXAMS environment: pond298.exv modified Tueday, 26 August 2008 at 06:14:07

Metfile: w12844.dvf modified Tueday, 26 August 2008 at 06:14:21

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 3.94 3.828 3.588 3.203 2.318 0.5716

1962 9.583 9.495 8.75 8.548 7.89 6.131

1963 22.25 17.18 15.05 14.08 12.9 10.79

1964 34.04 33.65 32.86 29.15 25.93 21.33

1965 37.44 37.15 36.75 35.87 33.01 28.84

1966 44.2 43.83 42.64 41.31 40.56 38.92

1967 43.29 43.1 42.49 42.12 41.77 41.12

1968 45.47 45.29 44.95 44.14 43.61 42.37

1969 54.07 53.78 53.16 51.98 49.82 47.22

1970 60.29 60.08 59.06 58.17 57.4 54.7

1971 68.56 67.91 66.4 63.82 60.09 55.04

1972 71.62 71.16 69.76 66.86 63.52 60.78

1973 65.85 65.66 65.3 64.91 64.57 62.45

1974 73.96 73.4 72.26 69.79 69 65.31

1975 67.05 66.88 66.26 65.28 64.76 63.06

1976 67.76 67.49 66.95 65.75 65.15 63.61

1977 79.62 79.1 77.31 72.39 69.78 67.59

1978 82.13 81.53 80.15 78.72 74.89 72.08

1979 80.73 80.5 79.51 77.94 77.15 75.51

1980 81.92 81.63 80.75 80.04 79.48 76.18

1981 79.97 79.18 78.43 76.68 75.13 73.7

1982 91.35 90.89 89.74 86.93 83.05 79.93

1983 92.84 92.39 91.34 89.9 88.89 84.72

1984 117 116 112 100 93.69 87.19

1985 101 101 99.32 97.29 96.75 93.92

1986 107 106 104 98.34 97.7 94.02

1987 105 105 103 100 99.68 95.81

1988 97.74 97.54 97.11 96.31 96.15 92.81

1989 91.99 91.76 90.98 89.39 88.82 86.48

1990 85.95 85.78 85.38 84.48 84.17 81.66

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.03 117.00 116.00 112.00 100.00 99.68 95.81

0.06 107.00 106.00 104.00 100.00 97.70 94.02

0.10 105.00 105.00 103.00 98.34 96.75 93.92

0.13 101.00 101.00 99.32 97.29 96.15 92.81

0.16 97.74 97.54 97.11 96.31 93.69 87.19

0.19 92.84 92.39 91.34 89.90 88.89 86.48

0.23 91.99 91.76 90.98 89.39 88.82 84.72

0.26 91.35 90.89 89.74 86.93 84.17 81.66

0.29 85.95 85.78 85.38 84.48 83.05 79.93

0.32 82.13 81.63 80.75 80.04 79.48 76.18

0.35 81.92 81.53 80.15 78.72 77.15 75.51

0.39 80.73 80.50 79.51 77.94 75.13 73.70

0.42 79.97 79.18 78.43 76.68 74.89 72.08

0.45 79.62 79.10 77.31 72.39 69.78 67.59

0.48 73.96 73.40 72.26 69.79 69.00 65.31

0.52 71.62 71.16 69.76 66.86 65.15 63.61

0.55 68.56 67.91 66.95 65.75 64.76 63.06

0.58 67.76 67.49 66.40 65.28 64.57 62.45

0.61 67.05 66.88 66.26 64.91 63.52 60.78

0.65 65.85 65.66 65.30 63.82 60.09 55.04

0.68 60.29 60.08 59.06 58.17 57.40 54.70

0.71 54.07 53.78 53.16 51.98 49.82 47.22

0.74 45.47 45.29 44.95 44.14 43.61 42.37

0.77 44.20 43.83 42.64 42.12 41.77 41.12

0.81 43.29 43.10 42.49 41.31 40.56 38.92

0.84 37.44 37.15 36.75 35.87 33.01 28.84

0.87 34.04 33.65 32.86 29.15 25.93 21.33

0.90 22.25 17.18 15.05 14.08 12.90 10.79

0.94 9.58 9.50 8.75 8.55 7.89 6.13

0.97 3.94 3.83 3.59 3.20 2.32 0.57

0.10 104.60 104.60 102.63 98.24 96.69 93.81

Average of yea 60.79

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: FLpepper aerial eco

Metfile: w12844.dvf

PRZM scenario: FLpeppersSTD.txt

EXAMS environment file: pond298.exv

Chemical Name: Tebuconazole

Description Variable Name Value Units Comments

Molecular weight mwt 308 g/mol

Henry's Law Const. henry 1.24E-10 atm-m^3/mol

Vapor Pressure vapr 1.30E-08 torr

Solubility sol 320 mg/L

Kd Kd mg/L

Koc Koc 1023 mg/L

Photolysis half-life kdp 590 days Half-life

Aerobic Aquatic Metabolism kbacw 1592 days Halfife

Anaerobic Aquatic Metabolism kbacs 2126 days Halfife

Aerobic Soil Metabolism asm 796 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP 0.253 kg/ha

Application Efficiency: APPEFF 0.95 fraction

Spray Drift DRFT 0.05 fraction of application rate applied to pond

Application Date Date 20-10 dd/mm or dd/mmm or dd-mm or dd-mmm

Interval 1 interval 7 days Set to 0 or delete line for single app.

app. rate 1 apprate kg/ha

Interval 2 interval 7 days Set to 0 or delete line for single app.

app. rate 2 apprate kg/ha

Interval 3 interval 7 days Set to 0 or delete line for single app.

app. rate 3 apprate kg/ha

Interval 4 interval 7 days Set to 0 or delete line for single app.

app. rate 4 apprate kg/ha

Interval 5 interval 7 days Set to 0 or delete line for single app.

app. rate 5 apprate kg/ha

Record 17: FILTRA

IPSCND 3

UPTKF

Record 18: PLVKRT

PLDKRT 0.078

FEXTRC 0.5

Flag for Index Res. Run IR EPA Pond

Flag for runoff calc. RUNOFF none none, monthly or total(average of entire run)
19

stored as FLpepper ground eco.out

Chemical: Tebuconazole

PRZM environment: FLpeppersSTD.txt modified Tueday, 26 August 2008 at 06:16:37

EXAMS environment: pond298.exv modified Tueday, 26 August 2008 at 06:14:07

Metfile: w12844.dvf modified Tueday, 26 August 2008 at 06:14:21

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 1.713 1.652 1.627 1.529 1.091 0.269

1962 7.097 7.033 6.278 5.994 5.86 4.799

1963 19.37 14.07 11.72 10.64 9.912 8.557

1964 30.04 29.78 29.01 25.43 22.57 18.58

1965 33.9 33.55 32.85 31.66 29.16 25.56

1966 40.88 40.51 39.29 37.94 37.19 35.31

1967 39.22 39.03 38.5 38.09 37.76 36.94

1968 41.13 40.94 40.6 39.79 39.26 37.63

1969 47.66 47.42 47.01 45.99 44.21 42.14

1970 55.33 55.11 54.05 53.16 52.4 49.46

1971 62.89 62.26 60.27 57.54 54.12 49.42

1972 65.87 65.31 63.41 60.46 57.45 55.13

1973 59.8 59.62 59.31 58.95 58.67 56.62

1974 68.04 67.47 66.34 63.87 63.11 59.37

1975 60.45 60.29 59.74 58.86 58.4 56.81

1976 61.39 61.12 60.55 59.2 58.8 57.13

1977 72.65 72.15 70.33 65.09 62.87 61.06

1978 75.09 74.52 72.86 71.51 67.99 65.55

1979 74.11 73.82 72.88 71.59 70.83 68.97

1980 75.38 75.08 74.18 73.41 72.88 69.54

1981 72.68 72.08 70.86 69.01 68.18 66.84

1982 84.1 83.62 82.47 79.65 76.07 73.27

1983 86.32 85.87 84.8 83.4 82.41 78.2

1984 111 109 105 93.35 86.98 80.69

1985 94.53 94.14 92.79 90.81 90.35 87.63

1986 100 99.53 97.41 91.91 91.31 87.68

1987 98.64 98.17 96.49 94.02 93.32 89.54

1988 91.04 90.85 90.41 89.7 89.6 86.38

1989 85.55 85.32 84.53 82.95 82.24 79.8

1990 78.68 78.52 78.15 77.37 77.13 74.8

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.03 111.00 109.00 105.00 94.02 93.32 89.54

0.06 100.00 99.53 97.41 93.35 91.31 87.68

0.10 98.64 98.17 96.49 91.91 90.35 87.63

0.13 94.53 94.14 92.79 90.81 89.60 86.38

0.16 91.04 90.85 90.41 89.70 86.98 80.69

0.19 86.32 85.87 84.80 83.40 82.41 79.80

0.23 85.55 85.32 84.53 82.95 82.24 78.20

0.26 84.10 83.62 82.47 79.65 77.13 74.80

0.29 78.68 78.52 78.15 77.37 76.07 73.27

0.32 75.38 75.08 74.18 73.41 72.88 69.54

0.35 75.09 74.52 72.88 71.59 70.83 68.97

0.39 74.11 73.82 72.86 71.51 68.18 66.84

0.42 72.68 72.15 70.86 69.01 67.99 65.55

0.45 72.65 72.08 70.33 65.09 63.11 61.06

0.48 68.04 67.47 66.34 63.87 62.87 59.37

0.52 65.87 65.31 63.41 60.46 58.80 57.13

0.55 62.89 62.26 60.55 59.20 58.67 56.81

0.58 61.39 61.12 60.27 58.95 58.40 56.62

0.61 60.45 60.29 59.74 58.86 57.45 55.13

0.65 59.80 59.62 59.31 57.54 54.12 49.46

0.68 55.33 55.11 54.05 53.16 52.40 49.42

0.71 47.66 47.42 47.01 45.99 44.21 42.14

0.74 41.13 40.94 40.60 39.79 39.26 37.63

0.77 40.88 40.51 39.29 38.09 37.76 36.94

0.81 39.22 39.03 38.50 37.94 37.19 35.31

0.84 33.90 33.55 32.85 31.66 29.16 25.56

0.87 30.04 29.78 29.01 25.43 22.57 18.58

0.90 19.37 14.07 11.72 10.64 9.91 8.56

0.94 7.10 7.03 6.28 5.99 5.86 4.80

0.97 1.71 1.65 1.63 1.53 1.09 0.27

0.10 98.23 97.77 96.12 91.80 90.28 87.51

Average of yea 55.46

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: FLpepper ground eco

Metfile: w12844.dvf

PRZM scenario: FLpeppersSTD.txt

EXAMS environment file: pond298.exv

Chemical Name: Tebuconazole

Description Variable Name Value Units Comments

Molecular weight mwt 308 g/mol

Henry's Law Const. henry 1.24E-10 atm-m^3/mol

Vapor Pressure vapr 1.30E-08 torr

Solubility sol 320 mg/L

Kd Kd mg/L

Koc Koc 1023 mg/L

Photolysis half-life kdp 590 days Half-life

Aerobic Aquatic Metabolism kbacw 1592 days Halfife

Anaerobic Aquatic Metabolism kbacs 2126 days Halfife

Aerobic Soil Metabolism asm 796 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP 0.253 kg/ha

Application Efficiency: APPEFF 0.99 fraction

Spray Drift DRFT 0.01 fraction of application rate applied to pond

Application Date Date 20-10 dd/mm or dd/mmm or dd-mm or dd-mmm

Interval 1 interval 7 days Set to 0 or delete line for single app.

app. rate 1 apprate kg/ha

Interval 2 interval 7 days Set to 0 or delete line for single app.

app. rate 2 apprate kg/ha

Interval 3 interval 7 days Set to 0 or delete line for single app.

app. rate 3 apprate kg/ha

Interval 4 interval 7 days Set to 0 or delete line for single app.

app. rate 4 apprate kg/ha

Interval 5 interval 7 days Set to 0 or delete line for single app.

app. rate 5 apprate kg/ha

Record 17: FILTRA

IPSCND 3

UPTKF

Record 18: PLVKRT

PLDKRT 0.078

FEXTRC 0.5

Flag for Index Res. Run IR EPA Pond

Flag for runoff calc. RUNOFF none none, monthly or total(average of entire run)
20

stored as CAtomato aerial eco.out

Chemical: Tebuconazole

PRZM environment: CAtomato_WirrigSTD.txt modified Tueday, 26 August 2008 at 06:16:36

EXAMS environment: pond298.exv modified Tueday, 26 August 2008 at 06:14:07

Metfile: w93193.dvf modified Tueday, 26 August 2008 at 06:16:12

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 2.907 2.821 2.556 2.235 2.068 0.8222

1962 4.532 4.444 4.179 3.851 3.681 2.471

1963 5.972 5.883 5.617 5.282 5.113 3.944

1964 7.236 7.146 6.88 6.544 6.392 5.268

1965 8.584 8.493 8.227 7.888 7.705 6.608

1966 9.596 9.504 9.236 8.889 8.703 7.654

1967 10.56 10.47 10.2 9.846 9.657 8.636

1968 11.37 11.28 11.01 10.66 10.49 9.482

1969 12.35 12.25 11.98 11.62 11.43 10.45

1970 13.11 13.02 12.75 12.39 12.2 11.26

1971 13.81 13.72 13.45 13.08 12.89 11.94

1972 14.36 14.26 13.99 13.63 13.44 12.57

1973 15.11 15.01 14.74 14.38 14.19 13.29

1974 15.59 15.5 15.22 14.84 14.65 13.77

1975 16.09 16 15.72 15.35 15.15 14.25

1976 16.84 16.77 16.52 16.34 16.26 15.17

1977 17.63 17.53 17.26 16.88 16.67 15.86

1978 17.86 17.77 17.62 17.3 17.09 16.18

1979 18.38 18.28 18.01 17.62 17.4 16.62

1980 18.51 18.41 18.14 17.76 17.55 16.74

1981 18.54 18.44 18.16 17.78 17.57 16.82

1982 18.72 18.62 18.34 18 17.82 17

1983 19.18 19.08 18.81 18.42 18.21 17.45

1984 19.13 19.03 18.75 18.36 18.13 17.43

1985 19.05 18.95 18.69 18.32 18.13 17.41

1986 19.37 19.27 18.99 18.62 18.41 17.69

1987 19.53 19.43 19.16 18.77 18.55 17.79

1988 19.48 19.38 19.11 18.72 18.5 17.75

1989 19.48 19.38 19.11 18.76 18.56 17.77

1990 19.65 19.55 19.27 18.89 18.67 17.93

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.03 19.65 19.55 19.27 18.89 18.67 17.93

0.06 19.53 19.43 19.16 18.77 18.56 17.79

0.10 19.48 19.38 19.11 18.76 18.55 17.77

0.13 19.48 19.38 19.11 18.72 18.50 17.75

0.16 19.37 19.27 18.99 18.62 18.41 17.69

0.19 19.18 19.08 18.81 18.42 18.21 17.45

0.23 19.13 19.03 18.75 18.36 18.13 17.43

0.26 19.05 18.95 18.69 18.32 18.13 17.41

0.29 18.72 18.62 18.34 18.00 17.82 17.00

0.32 18.54 18.44 18.16 17.78 17.57 16.82

0.35 18.51 18.41 18.14 17.76 17.55 16.74

0.39 18.38 18.28 18.01 17.62 17.40 16.62

0.42 17.86 17.77 17.62 17.30 17.09 16.18

0.45 17.63 17.53 17.26 16.88 16.67 15.86

0.48 16.84 16.77 16.52 16.34 16.26 15.17

0.52 16.09 16.00 15.72 15.35 15.15 14.25

0.55 15.59 15.50 15.22 14.84 14.65 13.77

0.58 15.11 15.01 14.74 14.38 14.19 13.29

0.61 14.36 14.26 13.99 13.63 13.44 12.57

0.65 13.81 13.72 13.45 13.08 12.89 11.94

0.68 13.11 13.02 12.75 12.39 12.20 11.26

0.71 12.35 12.25 11.98 11.62 11.43 10.45

0.74 11.37 11.28 11.01 10.66 10.49 9.48

0.77 10.56 10.47 10.20 9.85 9.66 8.64

0.81 9.60 9.50 9.24 8.89 8.70 7.65

0.84 8.58 8.49 8.23 7.89 7.71 6.61

0.87 7.24 7.15 6.88 6.54 6.39 5.27

0.90 5.97 5.88 5.62 5.28 5.11 3.94

0.94 4.53 4.44 4.18 3.85 3.68 2.47

0.97 2.91 2.82 2.56 2.24 2.07 0.82

0.10 19.48 19.38 19.11 18.76 18.55 17.77

Average of yea 12.93

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: CAtomato aerial eco

Metfile: w93193.dvf

PRZM scenario: CAtomato_WirrigSTD.txt

EXAMS environment file: pond298.exv

Chemical Name: Tebuconazole

Description Variable NameValue Units Comments

Molecular weight mwt 308 g/mol

Henry's Law Const. henry 1.24E-10 atm-m^3/mol

Vapor Pressure vapr 1.30E-08 torr

Solubility sol 320 mg/L

Kd Kd mg/L

Koc Koc 1023 mg/L

Photolysis half-life kdp 590 days Half-life

Aerobic Aquatic Metabolism kbacw 1592 days Halfife

Anaerobic Aquatic Metabolism kbacs 2126 days Halfife

Aerobic Soil Metabolism asm 796 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP 0.253 kg/ha

Application Efficiency: APPEFF 0.95 fraction

Spray Drift DRFT 0.05 fraction of application rate applied to pond

Application Date Date 21-07 dd/mm or dd/mmm or dd-mm or dd-mmm

Interval 1 interval 7 days Set to 0 or delete line for single app.

app. rate 1 apprate kg/ha

Interval 2 interval 7 days Set to 0 or delete line for single app.

app. rate 2 apprate kg/ha

Interval 3 interval 7 days Set to 0 or delete line for single app.

app. rate 3 apprate kg/ha

Interval 4 interval 7 days Set to 0 or delete line for single app.

app. rate 4 apprate kg/ha

Interval 5 interval 7 days Set to 0 or delete line for single app.

app. rate 5 apprate kg/ha

Record 17: FILTRA

IPSCND 3

UPTKF

Record 18: PLVKRT

PLDKRT 0.078

FEXTRC 0.5

Flag for Index Res. Run IR EPA Pond

Flag for runoff calc. RUNOFF none none, monthly or total(average of entire run)
21

stored as CAtomato ground eco.out

Chemical: Tebuconazole

PRZM environment: CAtomato_WirrigSTD.txt modified Tueday, 26 August 2008 at 06:16:36

EXAMS environment: pond298.exv modified Tueday, 26 August 2008 at 06:14:07

Metfile: w93193.dvf modified Tueday, 26 August 2008 at 06:16:12

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 0.59 0.58 0.52 0.46 0.42 0.18

1962 1.07 1.05 1.00 0.93 0.90 0.66

1963 1.45 1.43 1.38 1.31 1.28 1.06

1964 1.83 1.82 1.78 1.74 1.67 1.39

1965 2.21 2.19 2.14 2.07 2.03 1.83

1966 2.42 2.40 2.35 2.27 2.23 2.05

1967 2.66 2.64 2.59 2.51 2.47 2.29

1968 2.81 2.79 2.74 2.67 2.66 2.47

1969 3.15 3.13 3.08 3.00 2.96 2.79

1970 3.37 3.35 3.30 3.22 3.18 3.03

1971 3.54 3.52 3.46 3.39 3.35 3.18

1972 3.80 3.78 3.72 3.62 3.53 3.31

1973 3.94 3.92 3.86 3.79 3.75 3.60

1974 4.03 4.01 3.95 3.87 3.84 3.70

1975 4.13 4.11 4.06 3.98 3.94 3.79

1976 5.42 5.37 5.20 5.00 4.93 4.32

1977 5.03 5.01 4.95 4.87 4.82 4.71

1978 5.42 5.39 5.28 5.12 5.07 4.83

1979 5.39 5.37 5.31 5.23 5.18 5.08

1980 5.34 5.32 5.26 5.18 5.13 5.01

1981 5.26 5.23 5.18 5.10 5.05 4.95

1982 5.27 5.26 5.21 5.18 5.14 4.94

1983 5.49 5.47 5.41 5.34 5.30 5.21

1984 5.43 5.41 5.35 5.27 5.22 5.13

1985 5.39 5.37 5.34 5.27 5.21 5.06

1986 5.57 5.55 5.49 5.41 5.36 5.28

1987 5.60 5.58 5.53 5.45 5.40 5.30

1988 5.47 5.45 5.39 5.31 5.26 5.16

1989 5.38 5.36 5.31 5.26 5.22 5.09

1990 5.46 5.44 5.38 5.30 5.25 5.15

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.03 5.60 5.58 5.53 5.45 5.40 5.30

0.06 5.57 5.55 5.49 5.41 5.36 5.28

0.10 5.49 5.47 5.41 5.34 5.30 5.21

0.13 5.47 5.45 5.39 5.31 5.26 5.16

0.16 5.46 5.44 5.38 5.30 5.25 5.15

0.19 5.43 5.41 5.35 5.27 5.22 5.13

0.23 5.42 5.39 5.34 5.27 5.22 5.09

0.26 5.42 5.37 5.31 5.26 5.21 5.08

0.29 5.39 5.37 5.31 5.23 5.18 5.06

0.32 5.39 5.37 5.28 5.18 5.14 5.01

0.35 5.38 5.36 5.26 5.18 5.13 4.95

0.39 5.34 5.32 5.21 5.12 5.07 4.94

0.42 5.27 5.26 5.20 5.10 5.05 4.83

0.45 5.26 5.23 5.18 5.00 4.93 4.71

0.48 5.03 5.01 4.95 4.87 4.82 4.32

0.52 4.13 4.11 4.06 3.98 3.94 3.79

0.55 4.03 4.01 3.95 3.87 3.84 3.70

0.58 3.94 3.92 3.86 3.79 3.75 3.60

0.61 3.80 3.78 3.72 3.62 3.53 3.31

0.65 3.54 3.52 3.46 3.39 3.35 3.18

0.68 3.37 3.35 3.30 3.22 3.18 3.03

0.71 3.15 3.13 3.08 3.00 2.96 2.79

0.74 2.81 2.79 2.74 2.67 2.66 2.47

0.77 2.66 2.64 2.59 2.51 2.47 2.29

0.81 2.42 2.40 2.35 2.27 2.23 2.05

0.84 2.21 2.19 2.14 2.07 2.03 1.83

0.87 1.83 1.82 1.78 1.74 1.67 1.39

0.90 1.45 1.43 1.38 1.31 1.28 1.06

0.94 1.07 1.05 1.00 0.93 0.90 0.66

0.97 0.59 0.58 0.52 0.46 0.42 0.18

0.10 5.49 5.47 5.41 5.33 5.29 5.20

Average of y 3.68

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: CAtomato ground eco

Metfile: w93193.dvf

PRZM scenario: CAtomato_WirrigSTD.txt

EXAMS environment file: pond298.exv

Chemical Name: Tebuconazole

Description Variable NamValue Units Comments

Molecular weight mwt 308 g/mol

Henry's Law Const. henry 1.24E-10 atm-m^3/mol

Vapor Pressure vapr 1.30E-08 torr

Solubility sol 320 mg/L

Kd Kd mg/L

Koc Koc 1023 mg/L

Photolysis half-life kdp 590 days Half-life

Aerobic Aquatic Metabolism kbacw 1592 days Halfife

Anaerobic Aquatic Metabolism kbacs 2126 days Halfife

Aerobic Soil Metabolism asm 796 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP 0.253 kg/ha

Application Efficiency: APPEFF 0.99 fraction

Spray Drift DRFT 0.01 fraction of application rate applied to pond

Application Date Date 21-07 dd/mm or dd/mmm or dd-mm or dd-mmm

Interval 1 interval 7 days Set to 0 or delete line for single app.

app. rate 1 apprate kg/ha

Interval 2 interval 7 days Set to 0 or delete line for single app.

app. rate 2 apprate kg/ha

Interval 3 interval 7 days Set to 0 or delete line for single app.

app. rate 3 apprate kg/ha

Interval 4 interval 7 days Set to 0 or delete line for single app.

app. rate 4 apprate kg/ha

Interval 5 interval 7 days Set to 0 or delete line for single app.

app. rate 5 apprate kg/ha

Record 17: FILTRA

IPSCND 3

UPTKF

Record 18: PLVKRT

PLDKRT 0.078

FEXTRC 0.5

Flag for Index Res. Run IR EPA Pond

Flag for runoff calc. RUNOFF none none, monthly or total(average of entire run)
22

stored as PAtomato aerial eco.out

Chemical: Tebuconazole

PRZM environment: PAtomatoSTD.txt modified Tueday, 26 August 2008 at 06:16:42

EXAMS environment: pond298.exv modified Tueday, 26 August 2008 at 06:14:07

Metfile: w14751.dvf modified Tueday, 26 August 2008 at 06:14:59

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 3.027 2.984 2.759 2.655 2.587 0.7529

1962 10.92 10.75 10.39 10.18 9.946 4.975

1963 14.8 14.69 14.51 13.9 13.25 10.26

1964 16.73 16.66 16.47 16.08 16.06 14.34

1965 20.32 20.18 19.74 19.12 18.86 17.24

1966 25.69 25.5 25.23 24.86 24.81 21.13

1967 28.74 28.61 28.33 28.11 27.76 25.35

1968 32.9 32.76 32.44 32.31 32.29 28.69

1969 34.69 34.6 34.37 33.63 33.46 31.64

1970 37 36.85 36.55 36.4 36.06 34.24

1971 39.47 39.38 39.11 37.99 37.52 35.95

1972 42.98 42.8 42.62 41.86 40.75 38.42

1973 46.68 46.53 45.3 44.48 44.33 41.57

1974 47.19 47.1 46.71 46.14 46.1 45.02

1975 64.39 63.66 61.81 59.21 58.04 48.94

1976 68.46 67.91 66.76 64.68 63.52 56.58

1977 63.45 63.36 63.04 62.71 62.56 61.23

1978 63 62.93 62.78 62.66 62.58 61.53

1979 66.87 66.66 66.29 65.51 65.15 63.06

1980 66.83 66.68 66.16 65.64 64.99 63.55

1981 66.66 66.51 66.01 65.61 65.4 64.53

1982 65.9 65.79 65.38 65.11 65.02 64.39

1983 67.72 67.58 67.17 66.23 65.8 64.4

1984 66.94 66.85 66.54 66.13 65.97 64.87

1985 67.48 67.38 67.25 66.65 66.7 64.81

1986 66.92 66.82 66.38 66.06 66.06 65.22

1987 70.65 70.46 69.81 68.81 68.4 65.78

1988 68.94 68.81 68.38 68.32 68.19 67.11

1989 72.33 72.06 71.12 70.04 69.29 67.1

1990 71.59 71.37 70.81 70.59 70 68.17

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.03 72.33 72.06 71.12 70.59 70.00 68.17

0.06 71.59 71.37 70.81 70.04 69.29 67.11

0.10 70.65 70.46 69.81 68.81 68.40 67.10

0.13 68.94 68.81 68.38 68.32 68.19 65.78

0.16 68.46 67.91 67.25 66.65 66.70 65.22

0.19 67.72 67.58 67.17 66.23 66.06 64.87

0.23 67.48 67.38 66.76 66.13 65.97 64.81

0.26 66.94 66.85 66.54 66.06 65.80 64.53

0.29 66.92 66.82 66.38 65.64 65.40 64.40

0.32 66.87 66.68 66.29 65.61 65.15 64.39

0.35 66.83 66.66 66.16 65.51 65.02 63.55

0.39 66.66 66.51 66.01 65.11 64.99 63.06

0.42 65.90 65.79 65.38 64.68 63.52 61.53

0.45 64.39 63.66 63.04 62.71 62.58 61.23

0.48 63.45 63.36 62.78 62.66 62.56 56.58

0.52 63.00 62.93 61.81 59.21 58.04 48.94

0.55 47.19 47.10 46.71 46.14 46.10 45.02

0.58 46.68 46.53 45.30 44.48 44.33 41.57

0.61 42.98 42.80 42.62 41.86 40.75 38.42

0.65 39.47 39.38 39.11 37.99 37.52 35.95

0.68 37.00 36.85 36.55 36.40 36.06 34.24

0.71 34.69 34.60 34.37 33.63 33.46 31.64

0.74 32.90 32.76 32.44 32.31 32.29 28.69

0.77 28.74 28.61 28.33 28.11 27.76 25.35

0.81 25.69 25.50 25.23 24.86 24.81 21.13

0.84 20.32 20.18 19.74 19.12 18.86 17.24

0.87 16.73 16.66 16.47 16.08 16.06 14.34

0.90 14.80 14.69 14.51 13.90 13.25 10.26

0.94 10.92 10.75 10.39 10.18 9.95 4.98

0.97 3.03 2.98 2.76 2.66 2.59 0.75

0.10 70.48 70.30 69.67 68.76 68.38 66.97

Average of yea 45.36

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: PAtomato aerial eco

Metfile: w14751.dvf

PRZM scenario: PAtomatoSTD.txt

EXAMS environment file: pond298.exv

Chemical Name: Tebuconazole

Description Variable NameValue Units Comments

Molecular weight mwt 308 g/mol

Henry's Law Const. henry 1.24E-10 atm-m^3/mol

Vapor Pressure vapr 1.30E-08 torr

Solubility sol 320 mg/L

Kd Kd mg/L

Koc Koc 1023 mg/L

Photolysis half-life kdp 590 days Half-life

Aerobic Aquatic Metabolism kbacw 1592 days Halfife

Anaerobic Aquatic Metabolism kbacs 2126 days Halfife

Aerobic Soil Metabolism asm 796 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP 0.253 kg/ha

Application Efficiency: APPEFF 0.95 fraction

Spray Drift DRFT 0.05 fraction of application rate applied to pond

Application Date Date 3/9 dd/mm or dd/mmm or dd-mm or dd-mmm

Interval 1 interval 7 days Set to 0 or delete line for single app.

app. rate 1 apprate kg/ha

Interval 2 interval 7 days Set to 0 or delete line for single app.

app. rate 2 apprate kg/ha

Interval 3 interval 7 days Set to 0 or delete line for single app.

app. rate 3 apprate kg/ha

Interval 4 interval 7 days Set to 0 or delete line for single app.

app. rate 4 apprate kg/ha

Interval 5 interval 7 days Set to 0 or delete line for single app.

app. rate 5 apprate kg/ha

Record 17: FILTRA

IPSCND 3

UPTKF

Record 18: PLVKRT

PLDKRT 0.078

FEXTRC 0.5

Flag for Index Res. Run IR EPA Pond

Flag for runoff calc. RUNOFF none none, monthly or total(average of entire run)
23

stored as PAtomato ground eco.out

Chemical: Tebuconazole

PRZM environment: PAtomatoSTD.txt modified Tueday, 26 August 2008 at 06:16:42

EXAMS environment: pond298.exv modified Tueday, 26 August 2008 at 06:14:07

Metfile: w14751.dvf modified Tueday, 26 August 2008 at 06:14:59

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 1.731 1.693 1.462 1.238 0.9889 0.2668

1962 8.593 8.474 8.07 7.835 7.414 3.382

1963 11.56 11.45 11.26 10.55 9.69 7.687

1964 12.4 12.34 12.2 11.73 11.53 10.82

1965 14.22 14.15 13.93 13.61 13.44 12.79

1966 19.61 19.52 19.26 18.77 18.69 15.89

1967 21.93 21.86 21.67 21.39 20.89 19.37

1968 25.9 25.7 25.13 24.77 24.77 21.99

1969 26.8 26.71 26.49 25.6 25.23 24.26

1970 28.2 28.11 27.9 27.68 27.24 26.23

1971 30.38 30.3 30.03 28.78 28.1 27.34

1972 33.32 33.16 32.93 32.17 30.82 29.26

1973 36.77 36.62 35.31 34.32 33.97 31.93

1974 36.73 36.64 36.24 35.88 35.64 34.98

1975 53.71 53 50.71 48.21 47.15 38.52

1976 56.8 56.3 55.35 53.52 52.4 45.99

1977 52.21 52.12 51.79 51.3 51.01 50.35

1978 51.81 51.75 51.58 51.49 51.43 50.22

1979 54.05 53.88 53.48 52.96 52.74 51.39

1980 54.37 54.23 53.75 53.09 52.28 51.52

1981 54.22 54.13 53.84 53.45 53.25 52.18

1982 52.82 52.76 52.57 52.47 52.41 51.63

1983 54.34 54.2 53.8 52.68 52.03 51.3

1984 53.6 53.51 53.21 52.83 52.68 51.47

1985 53.35 53.28 53.11 52.5 52.31 51.1

1986 52.66 52.57 52.3 52.2 52.16 51.24

1987 56.19 56.01 55.39 54.27 53.64 51.59

1988 54.28 54.21 54.06 54.01 53.91 52.77

1989 56.89 56.66 55.86 54.97 54.13 52.53

1990 56.21 56.06 55.52 55.42 54.69 53.45

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.03 56.89 56.66 55.86 55.42 54.69 53.45

0.06 56.80 56.30 55.52 54.97 54.13 52.77

0.10 56.21 56.06 55.39 54.27 53.91 52.53

0.13 56.19 56.01 55.35 54.01 53.64 52.18

0.16 54.37 54.23 54.06 53.52 53.25 51.63

0.19 54.34 54.21 53.84 53.45 52.74 51.59

0.23 54.28 54.20 53.80 53.09 52.68 51.52

0.26 54.22 54.13 53.75 52.96 52.41 51.47

0.29 54.05 53.88 53.48 52.83 52.40 51.39

0.32 53.71 53.51 53.21 52.68 52.31 51.30

0.35 53.60 53.28 53.11 52.50 52.28 51.24

0.39 53.35 53.00 52.57 52.47 52.16 51.10

0.42 52.82 52.76 52.30 52.20 52.03 50.35

0.45 52.66 52.57 51.79 51.49 51.43 50.22

0.48 52.21 52.12 51.58 51.30 51.01 45.99

0.52 51.81 51.75 50.71 48.21 47.15 38.52

0.55 36.77 36.64 36.24 35.88 35.64 34.98

0.58 36.73 36.62 35.31 34.32 33.97 31.93

0.61 33.32 33.16 32.93 32.17 30.82 29.26

0.65 30.38 30.30 30.03 28.78 28.10 27.34

0.68 28.20 28.11 27.90 27.68 27.24 26.23

0.71 26.80 26.71 26.49 25.60 25.23 24.26

0.74 25.90 25.70 25.13 24.77 24.77 21.99

0.77 21.93 21.86 21.67 21.39 20.89 19.37

0.81 19.61 19.52 19.26 18.77 18.69 15.89

0.84 14.22 14.15 13.93 13.61 13.44 12.79

0.87 12.40 12.34 12.20 11.73 11.53 10.82

0.90 11.56 11.45 11.26 10.55 9.69 7.69

0.94 8.59 8.47 8.07 7.84 7.41 3.38

0.97 1.73 1.69 1.46 1.24 0.99 0.27

0.10 56.21 56.06 55.39 54.24 53.88 52.50

Average of yea 35.78

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: PAtomato ground eco

Metfile: w14751.dvf

PRZM scenario: PAtomatoSTD.txt

EXAMS environment file: pond298.exv

Chemical Name: Tebuconazole

Description Variable NameValue Units Comments

Molecular weight mwt 308 g/mol

Henry's Law Const. henry 1.24E-10 atm-m^3/mol

Vapor Pressure vapr 1.30E-08 torr

Solubility sol 320 mg/L

Kd Kd mg/L

Koc Koc 1023 mg/L

Photolysis half-life kdp 590 days Half-life

Aerobic Aquatic Metabolism kbacw 1592 days Halfife

Anaerobic Aquatic Metabolism kbacs 2126 days Halfife

Aerobic Soil Metabolism asm 796 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP 0.253 kg/ha

Application Efficiency: APPEFF 0.99 fraction

Spray Drift DRFT 0.01 fraction of application rate applied to pond

Application Date Date 3/9 dd/mm or dd/mmm or dd-mm or dd-mmm

Interval 1 interval 7 days Set to 0 or delete line for single app.

app. rate 1 apprate kg/ha

Interval 2 interval 7 days Set to 0 or delete line for single app.

app. rate 2 apprate kg/ha

Interval 3 interval 7 days Set to 0 or delete line for single app.

app. rate 3 apprate kg/ha

Interval 4 interval 7 days Set to 0 or delete line for single app.

app. rate 4 apprate kg/ha

Interval 5 interval 7 days Set to 0 or delete line for single app.

app. rate 5 apprate kg/ha

Record 17: FILTRA

IPSCND 3

UPTKF

Record 18: PLVKRT

PLDKRT 0.078

FEXTRC 0.5

Flag for Index Res. Run IR EPA Pond

Flag for runoff calc. RUNOFF none none, monthly or total(average of entire run)
24

stored as FLtomato aerial eco.out

Chemical: Tebuconazole

PRZM environment: FLtomatoSTD.txt modified Tueday, 26 August 2008 at 06:16:38

EXAMS environment: pond298.exv modified Tueday, 26 August 2008 at 06:14:07

Metfile: w12844.dvf modified Tueday, 26 August 2008 at 06:14:21

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 6.38 6.28 6.03 5.65 5.54 3.42

1962 16.42 16.20 15.60 14.74 14.23 10.17

1963 25.77 25.30 24.11 22.02 21.09 17.33

1964 40.50 39.93 38.13 36.47 35.56 28.33

1965 45.28 44.87 43.60 42.25 41.61 35.87

1966 54.37 53.92 52.38 50.64 49.65 43.15

1967 53.66 53.40 52.83 51.50 50.84 46.86

1968 69.66 68.90 68.05 65.30 63.53 54.53

1969 68.79 68.31 67.06 65.10 64.22 59.51

1970 72.72 72.21 70.55 68.83 67.68 62.28

1971 74.82 74.37 73.52 71.43 71.12 65.50

1972 85.60 85.13 84.07 82.74 81.35 72.41

1973 80.70 80.47 79.75 78.87 78.23 73.80

1974 75.29 75.11 74.50 74.11 73.50 71.52

1975 75.77 75.49 74.85 74.36 73.63 69.95

1976 83.52 82.86 80.75 77.98 76.62 71.30

1977 96.75 96.30 94.46 90.67 88.87 79.08

1978 92.39 91.86 90.40 88.19 87.19 81.81

1979 101.00 100.00 98.10 96.51 95.74 87.61

1980 101.00 99.93 98.43 96.47 95.41 89.43

1981 93.74 93.46 92.87 91.74 91.04 88.09

1982 102.00 101.00 99.84 98.20 97.45 90.59

1983 101.00 99.95 99.00 96.66 95.40 89.87

1984 104.00 104.00 101.00 99.63 98.24 91.22

1985 96.77 96.47 95.54 94.37 93.66 90.32

1986 91.75 91.59 91.31 90.45 89.61 86.65

1987 90.77 90.44 89.54 87.91 87.87 84.22

1988 101.00 101.00 98.08 96.34 95.01 87.19

1989 89.46 89.18 88.75 87.66 87.45 85.09

1990 93.06 92.58 91.81 90.86 90.23 84.28

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.03 104.00 104.00 101.00 99.63 98.24 91.22

0.06 102.00 101.00 99.84 98.20 97.45 90.59

0.10 101.00 101.00 99.00 96.66 95.74 90.32

0.13 101.00 100.00 98.43 96.51 95.41 89.87

0.16 101.00 99.95 98.10 96.47 95.40 89.43

0.19 101.00 99.93 98.08 96.34 95.01 88.09

0.23 96.77 96.47 95.54 94.37 93.66 87.61

0.26 96.75 96.30 94.46 91.74 91.04 87.19

0.29 93.74 93.46 92.87 90.86 90.23 86.65

0.32 93.06 92.58 91.81 90.67 89.61 85.09

0.35 92.39 91.86 91.31 90.45 88.87 84.28

0.39 91.75 91.59 90.40 88.19 87.87 84.22

0.42 90.77 90.44 89.54 87.91 87.45 81.81

0.45 89.46 89.18 88.75 87.66 87.19 79.08

0.48 85.60 85.13 84.07 82.74 81.35 73.80

0.52 83.52 82.86 80.75 78.87 78.23 72.41

0.55 80.70 80.47 79.75 77.98 76.62 71.52

0.58 75.77 75.49 74.85 74.36 73.63 71.30

0.61 75.29 75.11 74.50 74.11 73.50 69.95

0.65 74.82 74.37 73.52 71.43 71.12 65.50

0.68 72.72 72.21 70.55 68.83 67.68 62.28

0.71 69.66 68.90 68.05 65.30 64.22 59.51

0.74 68.79 68.31 67.06 65.10 63.53 54.53

0.77 54.37 53.92 52.83 51.50 50.84 46.86

0.81 53.66 53.40 52.38 50.64 49.65 43.15

0.84 45.28 44.87 43.60 42.25 41.61 35.87

0.87 40.50 39.93 38.13 36.47 35.56 28.33

0.90 25.77 25.30 24.11 22.02 21.09 17.33

0.94 16.42 16.20 15.60 14.74 14.23 10.17

0.97 6.38 6.28 6.03 5.65 5.54 3.42

0.10 101.00 100.90 98.94 96.65 95.71 90.28

Average of yea 66.71

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: FLtomato aerial eco

Metfile: w12844.dvf

PRZM scenario: FLtomatoSTD.txt

EXAMS environment file: pond298.exv

Chemical Name: Tebuconazole

Description Variable Name Value Units Comments

Molecular weight mwt 308 g/mol

Henry's Law Const. henry 1.24E-10 atm-m^3/mol

Vapor Pressure vapr 1.30E-08 torr

Solubility sol 320 mg/L

Kd Kd mg/L

Koc Koc 1023 mg/L

Photolysis half-life kdp 590 days Half-life

Aerobic Aquatic Metabolism kbacw 1592 days Halfife

Anaerobic Aquatic Metabolism kbacs 2126 days Halfife

Aerobic Soil Metabolism asm 796 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP 0.253 kg/ha

Application Efficiency: APPEFF 0.95 fraction

Spray Drift DRFT 0.05 fraction of application rate applied to pond

Application Date Date 3/4 dd/mm or dd/mmm or dd-mm or dd-mmm

Interval 1 interval 7 days Set to 0 or delete line for single app.

app. rate 1 apprate kg/ha

Interval 2 interval 7 days Set to 0 or delete line for single app.

app. rate 2 apprate kg/ha

Interval 3 interval 7 days Set to 0 or delete line for single app.

app. rate 3 apprate kg/ha

Interval 4 interval 7 days Set to 0 or delete line for single app.

app. rate 4 apprate kg/ha

Interval 5 interval 7 days Set to 0 or delete line for single app.

app. rate 5 apprate kg/ha

Record 17: FILTRA

IPSCND 3

UPTKF

Record 18: PLVKRT

PLDKRT 0.078

FEXTRC 0.5

Flag for Index Res. Run IR EPA Pond

Flag for runoff calc. RUNOFF none none, monthly or total(average of entire run)
25

stored as FLtomato ground eco.out

Chemical: Tebuconazole

PRZM environment: FLtomatoSTD.txt modified Tueday, 26 August 2008 at 06:16:38

EXAMS environment: pond298.exv modified Tueday, 26 August 2008 at 06:14:07

Metfile: w12844.dvf modified Tueday, 26 August 2008 at 06:14:21

Water segment concentrations (ppb)

Year Peak 96 hr 21 Day 60 Day 90 Day Yearly

1961 5.347 5.238 4.996 4.619 4.516 2.531

1962 14.57 14.35 13.7 12.87 12.39 8.418

1963 22.63 22.17 20.8 18.94 18.13 14.88

1964 37.41 36.83 35.06 33.37 32.49 25.45

1965 42.02 41.6 40.31 38.83 38.21 32.53

1966 50.66 50.2 48.66 46.81 45.86 39.42

1967 49.17 48.92 48.41 47.16 46.52 42.66

1968 65.04 64.29 63.52 60.77 59.03 50.09

1969 63.88 63.4 62.19 60.24 59.34 54.78

1970 67.42 66.92 65.22 63.55 62.45 57.23

1971 69.44 68.99 68.16 65.94 65.53 60.23

1972 80.11 79.66 78.52 77.16 75.75 67.18

1973 75.09 74.86 74.15 73.37 72.7 68.4

1974 69.46 69.32 68.73 68.28 67.69 65.81

1975 69.53 69.26 68.66 68.07 67.42 63.98

1976 76.94 76.3 74.23 71.58 70.29 65.15

1977 90.48 90.03 88.26 84.33 82.56 73.05

1978 86.22 85.68 84.25 82.09 80.99 75.73

1979 94.94 94.04 91.35 89.91 89.31 81.63

1980 93.98 93.34 91.95 90.12 89.14 83.4

1981 87.2 86.84 86.27 85.15 84.56 81.9

1982 95.27 94.76 93.6 91.81 90.81 84.45

1983 94.03 93.46 92.5 90.22 89.04 83.65

1984 97.44 96.96 94.76 93.2 91.89 84.97

1985 90.42 90.12 89.19 87.93 87.13 83.96

1986 84.99 84.68 84.48 83.74 82.87 80.1

1987 83.88 83.56 82.69 81.07 80.73 77.57

1988 94.65 93.85 91.35 89.72 88.39 80.63

1989 82.33 82.09 81.46 80.19 80.1 78.46

1990 86.34 85.86 85.14 83.94 83.43 77.64

Sorted results

Prob. Peak 96 hr 21 Day 60 Day 90 Day Yearly

0.03 97.44 96.96 94.76 93.20 91.89 84.97

0.06 95.27 94.76 93.60 91.81 90.81 84.45

0.10 94.94 94.04 92.50 90.22 89.31 83.96

0.13 94.65 93.85 91.95 90.12 89.14 83.65

0.16 94.03 93.46 91.35 89.91 89.04 83.40

0.19 93.98 93.34 91.35 89.72 88.39 81.90

0.23 90.48 90.12 89.19 87.93 87.13 81.63

0.26 90.42 90.03 88.26 85.15 84.56 80.63

0.29 87.20 86.84 86.27 84.33 83.43 80.10

0.32 86.34 85.86 85.14 83.94 82.87 78.46

0.35 86.22 85.68 84.48 83.74 82.56 77.64

0.39 84.99 84.68 84.25 82.09 80.99 77.57

0.42 83.88 83.56 82.69 81.07 80.73 75.73

0.45 82.33 82.09 81.46 80.19 80.10 73.05

0.48 80.11 79.66 78.52 77.16 75.75 68.40

0.52 76.94 76.30 74.23 73.37 72.70 67.18

0.55 75.09 74.86 74.15 71.58 70.29 65.81

0.58 69.53 69.32 68.73 68.28 67.69 65.15

0.61 69.46 69.26 68.66 68.07 67.42 63.98

0.65 69.44 68.99 68.16 65.94 65.53 60.23

0.68 67.42 66.92 65.22 63.55 62.45 57.23

0.71 65.04 64.29 63.52 60.77 59.34 54.78

0.74 63.88 63.40 62.19 60.24 59.03 50.09

0.77 50.66 50.20 48.66 47.16 46.52 42.66

0.81 49.17 48.92 48.41 46.81 45.86 39.42

0.84 42.02 41.60 40.31 38.83 38.21 32.53

0.87 37.41 36.83 35.06 33.37 32.49 25.45

0.90 22.63 22.17 20.80 18.94 18.13 14.88

0.94 14.57 14.35 13.70 12.87 12.39 8.42

0.97 5.35 5.24 5.00 4.62 4.52 2.53

0.10 94.91 94.02 92.45 90.21 89.29 83.93

Average of yea 61.53

Inputs generated by pe5.pl - Novemeber 2006

Data used for this run:

Output File: FLtomato ground eco

Metfile: w12844.dvf

PRZM scenario: FLtomatoSTD.txt

EXAMS environment file: pond298.exv

Chemical Name: Tebuconazole

Description Variable NameValue Units Comments

Molecular weight mwt 308 g/mol

Henry's Law Const. henry 1.24E-10 atm-m^3/mol

Vapor Pressure vapr 1.30E-08 torr

Solubility sol 320 mg/L

Kd Kd mg/L

Koc Koc 1023 mg/L

Photolysis half-life kdp 590 days Half-life

Aerobic Aquatic Metabolism kbacw 1592 days Halfife

Anaerobic Aquatic Metabolism kbacs 2126 days Halfife

Aerobic Soil Metabolism asm 796 days Halfife

Hydrolysis: pH 7 0 days Half-life

Method: CAM 2 integer See PRZM manual

Incorporation Depth: DEPI cm

Application Rate: TAPP 0.253 kg/ha

Application Efficiency: APPEFF 0.99 fraction

Spray Drift DRFT 0.01 fraction of application rate applied to pond

Application Date Date 3/4 dd/mm or dd/mmm or dd-mm or dd-mmm

Interval 1 interval 7 days Set to 0 or delete line for single app.

app. rate 1 apprate kg/ha

Interval 2 interval 7 days Set to 0 or delete line for single app.

app. rate 2 apprate kg/ha

Interval 3 interval 7 days Set to 0 or delete line for single app.

app. rate 3 apprate kg/ha

Interval 4 interval 7 days Set to 0 or delete line for single app.

app. rate 4 apprate kg/ha

Interval 5 interval 7 days Set to 0 or delete line for single app.

app. rate 5 apprate kg/ha

Record 17: FILTRA

IPSCND 3

UPTKF

Record 18: PLVKRT

PLDKRT 0.078

FEXTRC 0.5

Flag for Index Res. Run IR EPA Pond

Flag for runoff calc. RUNOFF none none, monthly or total(average of entire run)
26

APPENDIX B:

Tebuconazole foliar half-lives.

Crop Half-life1 (days) Location/Formulation MRID Number

Wheat Forage2 1.2 3.6 F/North Dakota 46574201

Soybean Forage2 8.4 3.6 F/Illinois

Soybean Hay2 5.3 3.6 F

Cherries3 11.6

1.8

5.8

1.2

45 DF/Oregon

Washington

New York

Wisconsin

42763901

17.3

4.3

6.9

45 DF/California

Michigan

Michigan

42763902

1 – Presents valid half-lives; data sets met the criteria (trials with Day 0 values) for calculating a half-life, and the 

results of the regression were statistically valid (Power ≥ 0.80). Wheat hay and barley dissipation data had a weak 

fit to the model with the value of power below 0.80, therefore, were excluded.

2 – Used for calculation of PLDKRT input parameter. The upper confidence bound on the mean metabolism halflife was 8.90 days (wheat forage, soybean hay, and soybean forage). 

PLDKRT input parameter = ln (0.5)/90% upper confidence bound (8.90) = 0.078