Pesticide volatilization or volatility refers to what process?

• A. Evaporation of pesticides from the site and travel as fumes
• B. Pesticide breakdown by soil microbes
• C. Pesticide absorption by plant leaves
• D. Pesticide filtration by rainwater

Answer: (A)

Volatility is the tendency of a pesticide to become a gas and move through the air. When a pesticide has enough vapor pressure, its molecules evaporate from the treated surface and travel as fumes, potentially drifting off-site. That’s why the description of evaporation from the site and travel as fumes fits volatility. Biodegradation is the breakdown of the chemical by soil microbes, plant uptake is the absorption and movement into plant tissues, and rainfall can wash off or move pesticides with water—none of these describe the pesticide turning into vapor and moving through air. Understanding volatility helps in choosing formulations and application conditions that reduce off-target drift and exposure.