Ornamental and Turf Pesticide Applicators Practice Exam

What is phytotoxicity?

1. Pest resistance to pesticides

2. Plant damage caused by pesticides

3. A method of pest control

4. Natural growth enhancer

The correct answer is: Plant damage caused by pesticides

Phytotoxicity refers specifically to the toxic effects that certain chemicals, particularly pesticides, can have on plants. When a pesticide is applied, if the concentration is too high or if it is not suited for the type of plant, it can cause damage such as wilting, leaf burn, stunted growth, or even death of the plant. Understanding phytotoxicity is crucial for applicators, as they must select and apply chemicals in a manner that minimizes harm to desirable plants while effectively targeting pests. Other choices do not accurately define phytotoxicity. Pest resistance to pesticides describes a scenario where a pest population develops the ability to survive despite pesticide applications, which is unrelated to the concept of damage to plants. A method of pest control refers to techniques or strategies used to manage pests, which does not encompass the idea of harmful effects on plants. A natural growth enhancer implies a substance that promotes plant growth, which is the opposite of phytotoxicity, as it involves detrimental effects on plant health rather than enhancement.