Which method can pests use to move off the application site?

Volatilization into gas is a method by which pests can move off the application site as it allows pesticides to evaporate into the air. When a pesticide is applied, especially if it is in a gaseous or volatile form, it can enter the atmosphere and disperse over greater distances. This process can lead to a broader area of impact than intended, as the pest may exit the application zone in search of a more suitable habitat or food source after the pesticide has been volatilized.

In contrast, while applying a second pesticide may affect pest populations further, it does not facilitate their movement off the application site. Increased humidity levels may influence pest behavior and activity but do not actively cause pests to move away from treated areas. Direct rainfall may wash pesticides away but does not inherently lead to pest movement; it can, however, affect how long a pesticide remains active on a surface. Therefore, volatilization is the method that specifically denotes movement away from the application area by turning into gas.