Pesticide Types And Formulations HARD EPA Standard Compatibility & Mixing Guidelines

When tank-mixing multiple formulations according to the standard WALES / DALE protocol, which formulation is added FIRST into the partially filled spray tank?

Multiple Choice Options

A Wettable powders (WP) and Water-dispersible granules (WDG). ✓ OFFICIAL VERIFIED CORRECT ANSWER
B Emulsifiable concentrates (EC).
C Liquid soluble concentrates (SL).
D Petroleum crop oils.
✓ LEGAL EXPLANATION & STATUTORY RATIONALE
EPA Standard Compatibility & Mixing Guidelines
Official Manual Chapter: Chapter 8: Formulations & Mixing

The universal mixing order (WALES/DALE) dictates: W (Wettable powders/WDG first), A (Agitation), L (Liquid flowables/suspension concentrates), E (Emulsifiable concentrates), S (Surfactants/Soluble liquids last).

Official EPA Core Study Domain Pesticide Types And Formulations
Practice All Domain Questions →