Indiana Pesticide Applicator Core Practice Exam

What term describes the movement of pesticides in particle form?

1. Vapor drift

2. Runoff

3. Spray drift

4. Leaching

The correct answer is: Spray drift

The movement of pesticides in particle form is best described as spray drift. This refers to the phenomenon where small droplets or particles of pesticides are carried away from the intended application area by wind or other environmental factors during or shortly after the application process. Spray drift can occur when pesticides are applied using various methods, such as aerial application or ground spraying, and it can lead to unintended exposure to non-target areas, including nearby plants, water sources, or residential areas. Understanding this term is crucial for pesticide applicators, as managing spray drift is essential for effective pest control as well as for protecting the environment and non-target organisms. Applicators often use techniques such as adjusting droplet size, employing windbreaks, and applying during optimal weather conditions to minimize spray drift and ensure that pesticides are delivered precisely where they are needed.