What is one potential effect of repeated use of the same pesticide class on the same site?

Repeated use of the same pesticide class on the same site can lead to the development of pest resistance. When a specific pesticide is continuously applied, targeted pests may survive and reproduce, passing on their resistance traits to subsequent generations. This selective pressure means that over time, the effectiveness of the pesticide diminishes, and the population of pests may become increasingly resistant to that pesticide class. This phenomenon is significant in pest management because it can lead to a cycle of escalating pesticide use, increased costs, and reduced crop yield, as well as potential environmental impacts due to the need for stronger or different chemicals. Establishing an integrated pest management approach, which includes rotating different pesticide classes, is crucial to minimize this risk and maintain effective control of pest populations.