Wyoming Pesticide Applicator Certification Practice Test

What is vapor drift?

1. A dry pesticide formulation in powder form that forms a suspension when added to water.

2. Weather related event that occurs when cool air is trapped near the surface under a layer of warm air.

3. The process of decontaminating an empty pesticide container by partially filling the container with water, replacing the lid, shaking the container, and then pouring the rinsate in the spray tank. This process is repeated three times.

4. The movement of chemical vapors from the application site.

The correct answer is: The movement of chemical vapors from the application site.

Vapor drift refers to the movement of chemical vapors from the application site. This can occur when pesticides or other chemicals are sprayed or applied, and the vapors are carried by the wind to areas outside of the intended target. Options A, B, and C are not related to vapor drift. Option A describes a dry pesticide formulation, option B describes a weather event, and option C describes a process for decontaminating pesticide containers. None of these options accurately define or describe vapor drift.