Which conditions are most conducive for the occurrence of volatility losses of a pesticide?

The occurrence of volatility losses of a pesticide is most conducive in conditions of warm temperature, low humidity, and high wind. Warm temperatures increase the vapor pressure of many pesticides, causing them to evaporate more readily compared to cooler conditions. Low humidity means that there is less moisture in the air, which can promote more rapid evaporation of the pesticide as there is less water vapor present to compete with the pesticide molecules. High winds can exacerbate this effect by dispersing the pesticide molecules away from the application site more quickly, leading to increased loss through volatilization.

In contrast, cooler temperatures reduce the volatility of pesticides, and high humidity increases the air's moisture content, which can slow down the evaporation process. Low winds can lead to a buildup of pesticide vapors in the area around the application site, which could result in less immediate loss to the atmosphere compared to conditions with high wind. Thus, the combination of warm temperature, low humidity, and high wind creates an environment conducive to significant volatility losses.