What is vapor drift?

Vapor drift refers to the phenomenon where a liquid pesticide turns into vapor and moves away from the intended treatment area after application. This process can occur when the pesticide volatilizes, meaning it changes from a liquid state to a gaseous state. Factors such as temperature, humidity, and wind conditions can influence the degree of volatilization and how far the vapor may drift.

Understanding vapor drift is crucial for applicators as it can lead to unintended exposure of non-target areas, including crops, wildlife, and humans. Proper management practices must be implemented to minimize vapor drift and ensure pesticides are used safely and effectively. The other choices provided do not accurately define vapor drift, with each referring to unrelated processes or practices.