**Primisulfuron -**  **methyl Name**  **( 128973**  **) Screening Level Usage Analysis (SLUA)** 

**Date: July 25, 2011**  **What is a Screening Level Usage Analysis (SLUA)?**   Available estimates of pesticide usage data for a particular active ingredient that is used on **agricultural** crops in the United States.  Pesticide usage data obtained from various sources. The data are then merged, averaged, and rounded so that the present ed information is not proprietary , business confidential, or trade secret. **What does it contain?**  Pesticide usage data for a **single** active ingredient only
.  Agricultural use sites (crops) that the pesticide is reported to be used on.  Available pesticide us age information from U.S. states that produce 80% or more of a crop, in most cases, or less than 80%, in rare cases, depending on the scope of the survey 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 data?**  **Average pounds of active ingredient applied** - Values are cal culated b y merging pesticide usage data sources together; averaging across all observations, then rounding. **Note:** If the estimated value is less than 500, then that value is labeled <500. Estimated values between 500 & <1,000,000 are rounded to 1 signif

icant digit. Estimated values of 1,000,000 or greater are rounded to 2 significant digits.)  **Average percent of crop treated** - Values are calculated by merging data sources together; averaging b y ye ar, averaging across all years, & rounding to the nearest multiple of 5. **Note:** If the estimated value is less than 2.5, then the value is labeled <2.5. If the estimated value is less than 1, then the value is labeled <1.  **Maximum percent of crop treated** - Value is the single maximum value reported across all data sources, across all ye ars, & rounded up to the nearest multiple of 5. **Note:** If the estimated value is less than 2.5, then the value is labeled <2.5. **What are the data sources used?**  **USDA -**  **NASS** (United States Department of Agriculture’s National Agricultural Statistics Service)

– pesticide usage data from 2003 to 2010 .  **Private pesticide market research**

– pesticid e usage data from 2003 to 20 10 .  **California Department of Pesticide Regulation (DPR) Pesticide Use Reporting**  **(PUR)** data for 2003 to 200 9 . **What are the limitations to the data?**  Additional registered uses may exist but are not included because the available survey s do not report usage (e.g., small acreage crops).  Lack of reported usage data for the pesticide on a crop **does not imply** zero usage.  Usage data on a particular site may be noted in data sources, but **not quantified** . In these instances, the site would not be reported 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 sites show some use, even though they are not on the label. This usage could be due to various factors, including, but not limited to S ection 18 requests, existing stocks of the chemical, data collection errors, and experimental use permits (EUPs).**July 25, 2011**

**Screening Level Estimates of Agricultural Uses of Primisulfuron**  **- meth**  **yl (**  **128973 )**  **Sorted Alphabetically**  **Percent Crop Ttd. Crop**  **Lbs. A.I. Avg.**  **Max. 1**  **Corn 3**  **0,000 <2.5**  **5**

SLUA data sources include: USDA - NASS (United States Department of Agriculture's National Agricultural Statistics Service) Private Pest icide Market Research These results reflect amalgamated data developed by the Agency

and are releasable to the public.