MDARD Michigan Core Pesticide Applicator Practice Exam

What effect can pesticides have on surfaces?

1. They can increase their strength

2. They can cause discoloration or corrosion

3. They prevent corrosion

4. They have no effect on surfaces

The correct answer is: They can cause discoloration or corrosion

Pesticides can indeed cause discoloration or corrosion of various surfaces. This is due to the chemical composition of many pesticides, which can be harsh and reactive when they come into contact with different materials. Depending on the formulation, certain pesticides may interact negatively with surfaces such as metals, plastics, or painted finishes, leading to visible damage or degradation over time. The potential for surface discoloration arises from the active ingredients or adjuvants in the pesticide products, which can stain or alter the appearance of surfaces, especially porous materials. Corrosion can occur particularly with metal surfaces, particularly if the pesticide contains corrosive agents. This is an important consideration for applicators, as it can impact the aesthetic and functional integrity of structures or equipment. Recognizing this effect is essential for safe and effective pesticide application, ensuring that applicators take care to protect surfaces and consider the potential side effects of the chemicals they are using.