MDARD Michigan Core Pesticide Applicator Practice Exam

How can nontarget plants and animals be harmed by pesticides beyond direct contact?

1. Only through direct spraying

2. By pesticide residues remaining in the environment

3. Through various local regulations

4. Through drifting particles only

The correct answer is: By pesticide residues remaining in the environment

Pesticide residues remaining in the environment can harm nontarget plants and animals through several pathways. After pesticides are applied, they can persist in the soil, water, and across various surfaces for some time. These residues may be taken up by plants that are not the intended targets, leading to potential toxicity. Additionally, non-target animals, including beneficial insects, birds, and aquatic life, may be exposed to these residues through various means such as ingestion of contaminated plants, water, or soil, further leading to harmful effects. Residues can also be transported by runoff or leach through the soil, spreading the pesticide beyond the initial application area. Understanding this pathway of exposure emphasizes the importance of responsible pesticide use and awareness of environmental impacts beyond the immediate application area.