Which term describes drift in vapor form. In some cases, volatile pesticides applied in liquid form evaporate back to the air before they have time to be absorbed by treated plants. In other cases, pesticides applied in gaseous form (ex. fumigants) escape and are carried away from the application site.

Which term describes drift in vapor form. In some cases, volatile pesticides applied in liquid form evaporate back to the air before they have time to be absorbed by treated plants. In other cases, pesticides applied in gaseous form (ex. fumigants) escape and are carried away from the application site.

• A. Vapor Drift (Volatility)
• B. Volatile
• C. Drift
• D. Absorption

Answer: (A)

Vapor drift describes the movement of a pesticide in its vapor form through the air. When a liquid pesticide is volatile, it can evaporate after application and become a gas, allowing those vapors to be carried by air currents and move off-target before plants can absorb them. The same idea applies to fumigants, which are already gases and can escape the application site and drift away. Describing it as a property, volatile means the tendency to vaporize, not the actual movement of vapor. Drift is a general term for off-target movement, not specifically in the vapor phase. Absorption refers to uptake into plant tissue, not the movement of the pesticide through the air.

Vapor drift describes the movement of a pesticide in its vapor form through the air. When a liquid pesticide is volatile, it can evaporate after application and become a gas, allowing those vapors to be carried by air currents and move off-target before plants can absorb them. The same idea applies to fumigants, which are already gases and can escape the application site and drift away.

Describing it as a property, volatile means the tendency to vaporize, not the actual movement of vapor. Drift is a general term for off-target movement, not specifically in the vapor phase. Absorption refers to uptake into plant tissue, not the movement of the pesticide through the air.