Which of the following is NOT a method to prevent pesticides from reaching groundwater?

Using excessive pesticide quantities is indeed not a method to prevent pesticides from reaching groundwater. In fact, applying more pesticide than recommended can lead to increased pesticide runoff and leaching into the soil, which may contaminate groundwater sources.

Following the labeled application directions is crucial as it provides guidance on the appropriate amount to use, reducing the risk of excess application and potential groundwater contamination. Avoiding risky application methods, such as applying during heavy rain or in highly permeable soils, is also essential in minimizing the chance of pesticides infiltrating water sources. Similarly, correctly disposing of unused pesticide containers ensures that residual chemicals do not enter the environment in a way that could lead to groundwater contamination. By adhering to established practices and guidelines, applicators can protect groundwater from pesticide pollution effectively.