Desmedipham ( 104801 ) Screening Level Usage Analysis (SLUA) Date: August 17, 2010 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 Un ited States.  Pesticide usage data obtained from various sources. The data are then merged, averaged, and rounded so that the presented 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 usage 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 ent ire United States). What assumptions can I make about the reported data?  Average pounds of active ingredient applied
- Values are calculated 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 significant digit. Estimated values of 1,000,000 or greater are rounded to 2 significant digits.)  Average percent of crop treate d - 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 2001 to 200 8 .  Private pesticide market research

– pesticide usage data from 2001 to 200 8 .  NPUD 2002 (National Pesticide Use Database) pesticide usage data from the CropL ife America Foundation are used only if data are not available from the other sources. What are the limitations to the data?  Additional registered uses may e xist 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 no t 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 sit es 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, existing stocks of the chemical, data collection errors, and experimental use permits (EUPs).August 17, 2010

Screening Level Estimates of Agricultural Uses of Desmedipham ( 104801 ) Sorted Alphabetically Percent Crop Ttd. Crop Lbs. A.I. Avg. Max. 1 Sugar Beets 200,000 90 95

All numb ers rounded. <500 Less than 500 pounds of active ingredient <2.5 Less than 2.5 percent of crop treated <1 Less than 1 percent of crop treated N/C Not Calculated * CA data only

(95% or more of U.S. acres in California) ** California data onl y . No infor mation available about use of this chemical on this crop in other states + Crops not known to be listed on active end use product registrations or as Section 18 emergency exemptions when this report was run SLUA data sources include: USDA
-NASS (United States Department of Agriculture's National Agricultural Statistics Service) Private Pest icide Market Research NPUD 2002 (National Pesticide Use Database) of the CropL ife America Foundation California DPR (Department of Pesticide Regulation) These resul ts reflect amalgamated data developed by the Agency

and are releasable to the public.