Which two factors are most important in avoiding vapor drift?

The most important factors in avoiding vapor drift are temperature and pesticide volatility. When temperatures increase, the volatility of certain pesticides can also increase, leading to a higher likelihood of them turning into vapor and drifting away from the target area during or after application. Pesticides with high volatility can easily evaporate into the air, especially on warm days, which can result in unintended exposure to non-target plants, animals, or humans.

By monitoring temperature and understanding the volatility of the pesticide being used, applicators can take proactive measures, such as selecting appropriate application times (e.g., during cooler parts of the day) or choosing less volatile products, to minimize the risk of vapor drift. This is crucial for ensuring both the effectiveness of pest control efforts and the safety of the surrounding environment.