What is a common effect of improper pesticide application?

Improper pesticide application can lead to the development of pest resistance, which is a significant concern in agricultural practices. When pesticides are not applied correctly—either in terms of dosage, timing, or frequency—pests can survive the exposure and adapt to the chemicals used against them. This adaptation may result in a population of pests that are increasingly resistant to the pesticide, making future applications less effective. Consequently, pest resistance can lead to higher pest populations over time, necessitating the use of stronger or more toxic chemicals to achieve similar effectiveness, which poses further risks to the environment and health.

The other outcomes associated with improper pesticide application, such as a decrease in pest populations or health benefits for farm workers, do not typically result from incorrect usage. Instead, they can represent the intended goals of effective pesticide use when applied correctly.