Wisconsin Pesticide Applicator Practice Test

What should you avoid when applying pesticides near water bodies?

1. Using coarse spray droplets

2. Spraying in calm weather conditions

3. Allowing drift to enter water bodies

4. Using low-pressure nozzles

The correct answer is: Allowing drift to enter water bodies

When applying pesticides near water bodies, it is crucial to minimize the risk of contamination in these sensitive environments. Allowing drift to enter water bodies is particularly harmful because it can directly impact aquatic life and disrupt entire ecosystems. Drift occurs when pesticide particles are carried away from the target application area by wind or other environmental factors. Once these chemicals enter waterways, they can have toxic effects on fish, amphibians, and other wildlife, as well as potentially affect the quality of water for human and animal consumption. In contrast, using coarse spray droplets is often recommended because they are less likely to drift than fine droplets. Spraying during calm weather conditions is also preferred as it helps to reduce the potential for drift. Similarly, utilizing low-pressure nozzles can minimize the generation of fine particles and further limit drift. Each of these practices contributes to a more controlled application, reducing the chances of pesticides affecting non-target areas, especially water bodies. Thus, focusing on avoiding any contamination through drift is essential to safe and responsible pesticide use near water.