MDARD Michigan Core Pesticide Applicator Practice Exam

Which statement about pesticide movement is correct?

1. It can only move in liquid form

2. It is unaffected by soil type

3. It can be influenced by weather and application techniques

4. It remains constant regardless of environmental factors

The correct answer is: It can be influenced by weather and application techniques

Pesticide movement is a complex process influenced by a variety of environmental factors and application techniques. The correct statement highlights that weather conditions, like rainfall and wind, can significantly affect how and where a pesticide moves in the environment. For example, heavy rainfall can lead to runoff, causing pesticides to move off-target and into nearby water bodies. Similarly, application techniques such as the method of spray (ground vs. aerial) or the droplet size can also impact how far and in what manner the pesticide disperses. Soil type plays a critical role in pesticide movement as well, as different soils can either retain or allow for the leaching of pesticides based on their texture and structure. The ability of a pesticide to bind to the soil or dissolve in water depends on various factors, including the chemical properties of the pesticide itself. Environmental factors such as temperature, moisture, and wind can also alter how pesticides are absorbed or evaporated. Understanding these dynamics is essential for effective and responsible pesticide application.