What is a common consequence of over-application of pesticides?

Over-application of pesticides leads to an increased risk of pest resistance and can also harm non-target organisms. When pesticides are applied in excessive amounts, it can create a selective pressure on pest populations. This pressure may result in the survival of only those pests that have developed resistance to the active ingredients of the pesticide, making them harder to control in the future.

Moreover, oversaturation of pesticides can negatively affect beneficial insects, such as pollinators and predators of pests, as well as other wildlife and plant species that are not intended to be affected. These impacts can disrupt ecosystems and lead to imbalances, as non-target organisms may play critical roles in the environment.

In contrast, improved pest control is not a valid outcome of over-application, as it can lead to resistance and reduced efficacy over time. Similarly, while some may assume that no significant effects on the environment could occur, the reality is that over-application often results in numerous negative environmental consequences. Lastly, enhanced crop yield typically is not a direct result of over-application; instead, proper management practices that consider the appropriate levels of pesticides tend to support sustainable yields and pest control.