High School

Which statement about the application of insecticides is true?

A. Simply killing many individuals is often the best way to reduce the size of a pest population.
B. Most insecticides kill the pest but not the pest's natural predators.
C. To control agricultural pests, pest management uses biological controls, chemicals, or cultural methods, but never a combination of these.
D. Pest species can rebound faster than their predators because the pests often have a higher reproductive rate than predators have.

Answer :

Pest species can rebound faster than their predators because they often have a higher reproductive rate. Hence, although pesticides control pests, they also kill non-pest species and can harm human health. On the other hand, biological control aims to reduce pest populations to economically insignificant levels, not to completely eliminate them.

The true statement about the application of insecticides is d. Pest species can rebound faster than their predators because the pests often have a higher reproductive rate than predators have.

Pesticides control pests, most of which are insects that cause damage to crops. However, they can lose their effectiveness as pest populations adapt and evolve. Additionally, they can cause collateral damage by killing non-pest species and potentially harm consumers and agricultural workers' health. In contrast, biological control uses one biological species to reduce the populations of another, with examples such as using ladybugs to reduce aphid populations, and parasitic wasps to minimize moth populations. However, it's important to note that these biological controls are not intended to completely exterminate pest populations but to reduce them to economically insignificant levels.

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