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Washington Administrative Code (Last Updated: November 23, 2016) |
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Title 16. Agriculture, Department of (See Titles 24, 60, and 142) |
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Chapter 16-230. Use of chemicals and chemically treated materials in certain counties. |
Section 16-230-640. Use restricted herbicides—Eastern Washington—Weather and temperature conditions.
Latest version.
- Use restricted herbicides shall not be applied on and after April 1 through October 31 of each year when there is a temperature inversion; or throughout the year if weather conditions are such that damage could result to adjacent and nearby towns, susceptible crops and plantings through physical drift or volatilization, or the temperature is 85°F. or above at the point of application: Provided, That application at the rate of fifty gallons or more per acre using nozzles having a minimum orifice diameter of .072 inches shall be exempt from the 85°F. temperature cutoff requirement: Provided further, That when using the invert system, applications may continue up to 95°F. with a maximum wind velocity of fifteen miles per hour and with water carrier at twelve or more gallons per acre.[Statutory Authority: Chapters 17.21, 15.58, and 34.05 RCW. WSR 07-11-041A, § 16-230-640, filed 5/9/07, effective 6/9/07. Statutory Authority: Chapters 15.58 and 17.21 RCW. WSR 88-05-033 (Order 1965), § 16-230-640, filed 2/12/88; WSR 87-09-015 (Order 1923), § 16-230-640, filed 4/6/87; WSR 80-03-041 (Order 1680), § 16-230-640, filed 2/20/80.]
Chapters 17.21, 15.58, and 34.05 RCW. WSR 07-11-041A, § 16-230-640, filed 5/9/07, effective 6/9/07. Statutory Authority: Chapters 15.58 and 17.21 RCW. WSR 88-05-033 (Order 1965), § 16-230-640, filed 2/12/88; WSR 87-09-015 (Order 1923), § 16-230-640, filed 4/6/87; WSR 80-03-041 (Order 1680), § 16-230-640, filed 2/20/80.