Indiana Pesticide Applicator Core Practice Exam

What does the term "abrasive" refer to when discussing wettable powders?

1. The risk they pose to applicators

2. The effect they have on application equipment

3. The impact on non-target organisms

4. The ability to mix uniformly with water

The correct answer is: The effect they have on application equipment

The term "abrasive" in the context of wettable powders specifically refers to the effect these substances can have on application equipment. Wettable powders consist of solid particles that need to be dispersed uniformly in water for effective application, but their abrasive nature can potentially cause wear and tear on pumps, hoses, and nozzles used in pesticide application. This can lead to equipment malfunction or decreased efficiency over time. While there may be concerns regarding the risks posed to applicators, the impact on non-target organisms, or their mixing properties in water, these aspects do not define the term "abrasive." Instead, the primary focus of the term pertains to how the physical characteristics of the wettable powders interact with and affect the tools and machinery used in the application process. Such understanding is critical for applicators to maintain their equipment and ensure its longevity and performance.