MDARD Michigan Core Pesticide Applicator Practice Exam

What characterizes nonselective pesticides?

1. They only affect specific types of organisms

2. They kill or affect many organisms

3. They are environmentally friendly

4. They work only on insect pests

The correct answer is: They kill or affect many organisms

Nonselective pesticides are characterized by their ability to kill or affect a broad range of organisms rather than targeting specific pests. This means that when applied, nonselective pesticides can impact not only the intended target pests but also beneficial insects, plants, and other wildlife within the environment. This broad spectrum of action is a significant feature of nonselective pesticides, making them effective for controlling weeds, pests, and diseases, but also raising concerns regarding their environmental impact and potential harm to non-target species. The other options focus on aspects that do not reflect the nature of nonselective pesticides. For instance, the assertion that they only affect specific types of organisms misrepresents their functionality, as nonselective pesticides are designed to impact a wide array. Additionally, labeling them as environmentally friendly does not align with their general usage, as their indiscriminate nature can lead to detrimental effects on ecosystems. Lastly, the idea that they work only on insect pests is inaccurate because these pesticides can target various life forms, including plants and non-insect pests, thus reinforcing the understanding that nonselective pesticides do not confine their action to a specific type of organism.