UNITED STA TES ENVIRONMENTAL PROTECTION AGENCY WASHINGTON O

. C ., 20460 

### AUG 1 3 

## 2015

OFFICE OF CH EM I CA L SA F ETY AN O POLLUTIO N PRE VE N TIO N 

### MEMORANDUM
SUBJECT: Updated Screen ing Level Usage Analysis (SLUA) Report for Diquat dibromide PC # 032201 

### FROM:

THRU:

TO: Jihad Alsadek , Ph.D. , Economist 

## :r 'vW. A

# ~ Science and In formation Analysis Branch I

.

### ~ Diann Sims , C hi ef , 

# &/**:>-,.._/~~** Science Information and Analysis Branch Biological and Economic Analysis Division (7503P) Bonnie Adler, Chemical Risk Manager Risk Management and Im plementation Branch 5 Pesticide Re- evaluation Di

. vision (7508P) This memorandum transmits an updated Screening Level Usage Analysis (SLUA) report for the diquat di bromide (previously completed in 2009). The usage data in the updated SLUA (2015) are an amalgamation of USDA/NASS and Private Pesticide Market Research data from 2004 to 2013. The new SLUA (2015) s hows an increase in usage , in terms of pounds a.i. and/or percent crop treated on three crops (apple s, potatoes, and tomatoes) , and a decrease, in term s ofpounds a.i. and/or percent crop treated , on almonds only. The usage data did not change for several crops including a lfalfa, avocado s, cherries, grapes , and pecans. In the current SLUA there is reported usage data for some crops that was not observed during the previous reporting period. These include artichokes, cantaloupes, carrots, cotton, figs , pistachio s, pomegranate s, raspberrie s, squash , and watermelons. 

### Also usage on several crops reported in the 2009 SLUA were not observed in the current reported period. These include olives,**pea~hes ,**  peppers , and strawberries. For questions , comments and other usage in fo nn ation requests , please contact me at 703-308- 8140.

.



## . ..

### Diquat dibromide (032201) Sc reening Level Usage Analysis (SLUA) Date: July 31, 2015 What is a Sc reening L evel Usage Analysis (SLUA)? • Available estimate s of pesticide usage data for a particular active in g r edient that is used on 

### agricultural crops in the U nited States. • Pesticide u sage data obtained from various sources. The data are then me rged, averaged , and rounded so that the presented information is not proprietary, business confidentia l , or trade secret. 

### What does it contain? • Pesticide usage data for a 

### s ingle acti ve ingredient only. • Agricultural use s ite s (crops) that the pesticid e is 

### reported to be used on. • Avai lable pesticide usage information from U.S. states that produce 80% or more of a crop , in most cases, or le ss than 80%, in rare cases , depending on the scope of the s urv ey and available resources. • Annual percent of crop treated 

### (average & 

### maximum) for each agricultural crop. • Average annual pounds of the pesticide applied for each agricultural crop ( i.e. , for the states surveyed, not for the entire United States). 

### What assumptions can I make about the reported d a ta? • Average pounds of active ingredient applied

- Values are calcu lated by merging pesticide usage data sources together ; averaging across all observations, then rounding. 

### No te: 

## If the estimated value is less than 500 , th en that value is labeled < 500. Estimated values between 500 & 

### < l ,000,000 are rounded to 1 significant digit. Eslimated values of 1, 000,000 or g rea ter are rounded to 2 significant digits.) 

### • Average percent of crop treated

- Value s are calculated by merging data so urces together; averaging by year , averaging across all years , 

### & rounding to the ne arest multiple of 5, . 

### Note: 

## If th e eslimated value is less than 2.5, then the value is labeled <2.5. 

## If the estimated value is less than 1, then the valu e i s lab e led < l. 

### • Maximum perc en t of crop treated

- Va lue is the si ngle maximum value reported across all data sources, across a ll years , & rounded up t o the nearest multipl e of 5. 

### No te: 

## If the estimated value is less than 2.5 , then the value is labeled < 2.5. 

### What are the data sources u sed ? • USDA-NASS (United States Department of Agriculture's Nationa l Agricu ltural Statistics Se r vice)

- pesticide usage data from 2004 to 2013. 

### • Private pesticid e market research

- pesticide usage data from 2004 to 2013. 

### • Ca lifornia Department of Pesticide Re gulation (DPR) Pesficide Use Reporting (PUR) data for 2004 to 2012. 

### What are the limitation s to the data? • Additional registered uses may exist but are not included because the available surveys do not report usage (e .g. , small acreage crops). • Lack of reported usage data for the pesticide on a crop 

### does riot imply zero usage. • Usage data on a particular site may be noted in data sources, but 

### not quantified

. In the se in s tances, the site would not be rep orted in the SLUA. · · • Non-agricultural use sites (e.g

. , turf , post-harvest, mosquito control , etc.) are not reported in the SLUA

. A separate request must be made to receive these estimates. • Some s ites show some use , even though they are not on the label. This usage could be due to various factors , including , but not limited to Section 18 requests , exi s ting stocks ofthe chemical , d ata collection errors, and experimental use permits (EUPs).

### Date: July 31, 2015 Screening Level Es timates of Agricultural Uses of Diquat dibromide (032201) Sorted Alphabetically Reporting Years: 2004-2013 A nnual Average Percent C rop Treated Cro p 1 A lfalfa 2 Almonds 3 Apples 4 Artichokes 5 Avocados 

### 6 Cantaloupe s 7 

### C h erries 

### 8 Figs * 

### 9 Grapes 

### 10 Pecans 11 

### Pi stachio s* 12 

### Pome2ranates * 13 

### Potatoes 14 

### Sq ua s h 15 Tomatoes 16 W a te rmelon s All numbers are rounded. < 500: less than 500 pounds ofactive ingredients. <2.5: le ss th an 2.5 percent of crop is treated. < I: less than I p ercent of crop is treated. 

### Lb s. A.I. <5 00 <5 00 2,000 <500 3,000 <500

' <500 <500 <500 <500 <5 00 <50 0 200,000

< 500 2,000 <5 00

*Based on CA DPR data on ly (80% or more of U.S

. acres grown are in California). SLUA data so urces include: 

### Average < l < 1 <2 .5

5 5 <1 < l <2 .5

< 1 < l < l < 1 35 <2.5 <2.5 <2.5

USDA-NASS (United States Department of Agricu lture's National Agricu ltura l Statis tics Service) Private Pe s ticide Market Research California DPR (Department of Pesticide Regulation) These re s ult s reflect amalgamated data developed by the Agency and are rel easable to th e public. 

### Maximum <2.5 <2.5 <2 .5

5 5 <2.5 <2.5 <2.5 <2.'5 <2.5 <2.5 <2.5



## so <2.5 <2.5 <2.5