How can you define "pesticide resistance" in pest populations?

"Pesticide resistance" refers to a phenomenon where pest populations become less sensitive or immune to the effects of pesticides that were previously effective in controlling them. This reduced sensitivity occurs through biological changes in the pest population over time, often as a result of natural selection. When a pesticide is applied, most of the susceptible individuals are killed, while those with genetic mutations that confer resistance survive and reproduce. As a result, subsequent generations are more likely to exhibit resistance to that specific pesticide.

The growing concern surrounding pesticide resistance is significant because it can lead to increased pest populations, decreased efficacy of control measures, and more complex pest management strategies. Understanding this concept is critical for effective pest management and helps explain why integrated pest management strategies, which include rotating different types of pesticides and employing non-chemical control methods, are essential in sustaining pest control efforts.