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Chlorpyrifos <br />Continued <br />CONDITION D <br />Application 3. Chemigation applications: <br />method . The permittee or permittee's authorized representative, who is <br />restrictions laiowledgeable of the irrigation system, must be present at the <br />(continued) treatment site during the application and must be trained as a <br />pesticide handler; <br />4. Granular applications: <br />Incorporate or clean-up granules that are spilled during loading or are <br />visible on the soil surface in turn areas. <br />Determining <br />Active ingredient (AI) application rate determines setback distance and is <br />application <br />expressed as pounds of active ingredient per acre (lbs AI/ac). Liquid product <br />rate- <br />labels usually have the application rate as pints or quarts of product per acre. <br />Converting <br />To determine lbs AI/ac, the volume of product applied needs to be converted <br />liquid volume <br />to pounds of active ingredient based on the amount of chlorpyrifos active <br />to lbs AI/ac <br />ingredient in the product. <br />Generalized formula: <br />(lbs AUgallon indicated on the label) x (product volume converted to gallons) <br />Example — Lorsban Advanced <br />• Proposed application rate is 2 pints/acre <br />• Label states it contains 3.755 pounds of chlorpyrifos per gallon of <br />product. <br />• 8 pints in a gallon. <br />• lbs AI/ac = 3.755 lbs Al /gal x 2 pints/ac _ 8 pints/gal = 0.939 lbs AI/ac. <br />2 <br />Chlorpyrifos <br />Continued on next page <br />