Washington Pesticide Laws and Safety Practice Test 2025 - Free Pesticide Laws Practice Questions and Safety Study Guide

Pesticides are substances that are used to repel or mitigate pests, and they can include both chemical and non-chemical methods. Option A is the correct answer because it states that a pesticide is any substance intended to repel or mitigate pests, excluding viruses on humans or animals. This means that any substance that is used to control or eliminate pests, such as insects or weeds, would qualify as a pesticide under Washington state law.

Option B is incorrect because while some substances used as plant nutrients may also have pesticide properties, they are not solely considered as pesticides. Similarly, option C is incorrect because a chemical used for industrial cleaning may have pesticide properties, but it is not solely considered as a pesticide. Option D is also incorrect because a naturally occurring substance may be considered a pesticide if it is intended to repel or mitigate pests, but it does not exclude human intervention.