Minnesota Pesticide Applicator Practice Test

What is plant injury due to chemical exposure called?

1. Toxicity

2. Phytotoxicity

3. Leaching

4. Secondary exposure

The correct answer is: Phytotoxicity

Phytotoxicity refers specifically to the harmful effects that certain chemicals, particularly pesticides, can have on plants. This term encompasses various types of plant injury resulting from exposure to these chemicals, which can manifest as stunted growth, discoloration, leaf burn, or even plant death. Understanding phytotoxicity is crucial for pesticide applicators, as it helps them recognize the potential risks of pesticide use and implement practices to minimize unintended harm to non-target plants. Toxicity is a broader term that describes the degree to which a substance can harm living organisms, but it does not specifically address the effects on plants. Leaching pertains to the process of chemicals moving through the soil with water, which may not directly relate to plant injury. Secondary exposure refers to unintentional contact with chemicals by non-target organisms or humans, rather than the direct effects on plants. Therefore, focusing on phytotoxicity is essential for anyone involved in pest management to ensure the safe and effective use of agricultural chemicals.