WAC 16-232-035   What are the restrictions on use restricted herbicides in Walla Walla County due to wind conditions?  The use or application of use restricted herbicides is prohibited in Areas 1, 2, 2A, 3, and 3A when the mean sustained wind velocity is over twelve miles per hour throughout the year: Provided, That such applications are prohibited in Areas 1 and 2 on and after April 1 through October 31 when the mean sustained wind velocity is over seven miles per hour: Provided further, That applications of use restricted herbicides are allowed in winds up to and including twenty miles per hour when allowed by the label and when an approved hooded boom sprayer is used. Hooded boom sprayers shall be approved by the department of agriculture. The department will consider the recommendations of the pesticide advisory board 2,4-D ad hoc committee in determining the criteria of what constitutes an approved hooded boom sprayer. Approval will be based on research data.



[Statutory Authority: Chapters 17.21, 15.58, and 34.05 RCW. 07-11-041A, § 16-232-035, filed 5/9/07, effective 6/9/07. Statutory Authority: Chapters 15.58 and 17.21 RCW. 88-09-013 (Order 1973), § 16-232-035, filed 4/12/88; 87-09-015 (Order 1923), § 16-232-035, filed 4/6/87; 80-03-026 (Order 1665), § 16-232-035, filed 2/20/80.]