What is the main environmental factor that can influence pesticide volatility?

What is the main environmental factor that can influence pesticide volatility?

• A. Soil composition
• B. Temperature
• C. Humidity
• D. Wind speed

Answer: (B)

Volatility is about how easily a chemical goes into the vapor phase, which is governed by vapor pressure. Temperature directly increases vapor pressure: as the day gets hotter, more pesticide molecules gain enough energy to escape from the liquid into the air, so volatilization rises. Wind speed can move the vapor away once it’s in the air, and soil or humidity can affect how much pesticide sticks around, but they don’t change the substance’s intrinsic tendency to vaporize. So the main environmental factor that influences pesticide volatility is temperature.

Volatility is about how easily a chemical goes into the vapor phase, which is governed by vapor pressure. Temperature directly increases vapor pressure: as the day gets hotter, more pesticide molecules gain enough energy to escape from the liquid into the air, so volatilization rises. Wind speed can move the vapor away once it’s in the air, and soil or humidity can affect how much pesticide sticks around, but they don’t change the substance’s intrinsic tendency to vaporize. So the main environmental factor that influences pesticide volatility is temperature.