The continued use of a pesticide causes insects to become immune to chemical compounds contained in the pesticide, and as a result pesticides can become ineffective.

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This phenomenon is known as pesticide resistance or insecticide resistance. Over time, repeated exposure to the same pesticide can cause the targeted insect population to develop genetic adaptations that make them less susceptible to the effects of the chemical compound. This can lead to the need for higher concentrations or different types of pesticides in order to achieve the same level of effectiveness. Eventually, if left unchecked, pesticide resistance can render a particular pesticide or class of pesticides completely ineffective.

The Continued Use of a Pesticide Causes Insects to Become