What does 'resistance' in pest populations refer to?

'Resistance' in pest populations specifically refers to the ability of pests to survive exposure to a pesticide due to genetic adaptation. This phenomenon occurs when certain individuals within a pest population possess genetic traits that allow them to withstand the effects of a pesticide. Over time, as these resistant individuals reproduce, the proportion of resistant pests in the population increases, leading to a scenario where commonly used pesticides become less effective.

This process of resistance can happen through various mechanisms, such as alterations in the insect's physiology that prevent the pesticide from working effectively, or behavioral changes that allow pests to avoid contact with pesticides. Understanding resistance is crucial for pest management because it influences how we select and apply pesticides over time, pushing for strategies that can delay the development of resistance in pest populations.