Which of the following is not mentioned as a factor affecting pesticide performance?

• A. Mixing With Another Pesticide
• B. Exposure To Sunlight
• C. Exposure To Rain
• D. Wind Speed

Answer: (D)

Pesticide performance is shaped by how the product behaves after mixing and once it’s on the target, including chemical compatibility and environmental exposure. In the materials this question draws from, the factors listed are mixing with another pesticide, exposure to sunlight, and exposure to rain. Wind speed isn’t mentioned among these post-application factors, so it’s the one not covered in that context. While wind speed matters for how a spray is applied—affecting deposition and drift—it isn’t cited here as a factor that alters performance after application. The other factors fit because mixing can cause incompatibilities that reduce effectiveness, sunlight can degrade the product, and rain can wash it off or dilute it, lowering performance.