Pennsylvania Pesticide Applicator Practice Exam

Question: 1 / 400

What is the term for the ability of a pest to tolerate a pesticide that once effectively controlled it?

Genetic Drift

Pesticide Resistance

Pesticide resistance refers to the ability of a pest population to tolerate a pesticide that was previously effective in controlling it. This phenomenon occurs when pests undergo genetic changes, often through natural selection, allowing them to survive exposure to a specific chemical. Over time, as the same pesticide is applied repeatedly, individuals that possess genetic traits enabling them to resist its effects survive and reproduce. Consequently, a higher proportion of the population becomes resistant, reducing the overall efficacy of the pesticide.

Understanding pesticide resistance is crucial for effective pest management. It highlights the importance of integrated pest management strategies that diversify control methods to slow down or prevent the development of resistance. This includes rotating different classes of pesticides, using biological control methods, and employing cultural practices that disrupt pest life cycles.

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Biological Variation

Ecosystem Disruption

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