Which of the following are two types of pesticide drift?

The correct answer identifies two primary types of pesticide drift: particle drift and vapor drift.

Particle drift occurs when small droplets of liquid pesticides are carried away from the application site by wind or air movement. This can happen during spraying when the droplets are fine enough to be affected by even slight gusts or breezes, leading them to land in unintended areas. It's a crucial consideration for applicators who must take measures to minimize the impact of their application on surrounding plants, waterways, or residential areas.

Vapor drift, on the other hand, refers to the movement of pesticide vapors that can volatilize from the product after application. Certain pesticides can change from liquid to gas after being applied, allowing these vapors to travel more significant distances than particles. Conditions such as temperature, humidity, and air flow can enhance or lessen the rate of vapor drift, making it essential for applicators to understand the timing and environmental conditions when applying these substances.

Understanding both types of drift is vital for effective and responsible pesticide application, ensuring that the chemicals used do not harm beneficial organisms or the environment. Recognizing the differences helps in selecting the right application methods and equipment to mitigate drift and its associated impacts.