§ 186.1750 - Diazinon.

A regulation is established permitting the use of the insecticide diazinon (O,O-diethyl O-[6-methyl-2-(1-methyl-ethyl)-4-py-rim-i-dinyl] phos-phorothioate; CAS Reg. No. 333-41-5) in animal feed-handling establishments in accordance with the following prescribed conditions:

(a) Application shall be limited solely to spot and/or crack and crevice treatment in animal feed handling establishments, including feed manufacturing and processing establishments such as stores, supermarkets, dairies, meat slaughtering and packing plants, and canneries, where feed and feed products are held, processed, and sold.

(1) Spray and dust concentrations shall be limited to a maximum of 1 percent and 2 percent, respectively, of active ingredient by weight. The spray concentration limit of 1 percent shall include, but not be limited to, encapsulated formulations of the additive utilizing the encapsulating polymer formed from the reaction of sebacoyl chloride, polymethylene polyphenylisocyanate, ethylenediamine and/or diethylenetriamine.

(2) Application to areas, surfaces, or utensils contacted by feed, contamination of feed or feed contact surfaces, and the introduction of spray or dust into the air is to be avoided.

(3) For spot treatment, a coarse, low-pressure spray shall be used. Application is limited to floor surfaces only and to 20 percent of the surface area. Any individual spot treatment shall not exceed 2 square feet.

(4) For crack and crevice treatment, equipment capable of delivering dust or a pin stream of spray directly into cracks and crevices shall be used.

(b) To assure safe use of the insecticide, its label and labeling shall conform to that registered by the U.S. Environmental Protection Agency, and it shall be used in accordance with such label and labeling.