MDARD Michigan Core Pesticide Applicator Practice Exam

Which type of pesticide drift is caused by gaseous vapors?

1. Spray drift

2. Particle drift

3. Vapor drift

4. Ground drift

The correct answer is: Vapor drift

Vapor drift is a type of pesticide drift that occurs when pesticides evaporate into the air and are carried away in vapor form. This happens when the active ingredients in a pesticide formulation transition from a liquid state to a gas and can be transported by air currents, leading to potential unintended exposure of non-target areas or organisms. Vapor drift is particularly significant because it can cover larger distances than other types of drift due to the nature of gaseous particles mingling with the atmosphere. It can be influenced by environmental conditions such as temperature, humidity, and wind speed, making it important for applicators to be aware of these factors when applying pesticides. Understanding vapor drift is crucial for minimizing negative impacts on neighboring crops, wildlife, and human health, as it emphasizes the importance of following label recommendations and choosing appropriate application methods and times to mitigate potential issues.