Which practice is least effective for ensuring safe pesticide application?

Using pesticides near water sources is recognized as the least effective practice for ensuring safe pesticide application. Pesticides can easily contaminate water bodies, posing risks to aquatic life, potentially leading to water pollution and affecting the broader ecosystem. The proximity to water increases the likelihood of runoff or unintended drift, which can result in adverse environmental impacts and health hazards to non-target organisms, including humans who may rely on that water for drinking or other uses.

In contrast, reading the pesticide label is essential as it provides critical information on safe usage, application rates, and protective measures. Wearing personal protective equipment (PPE) is crucial for minimizing exposure to harmful substances during application, thus ensuring the safety of the applicator. Spacing out applications is a strategic approach that allows for better absorption and reduces the buildup of chemicals in the environment, ultimately contributing to safer pest control practices. Each of these practices contributes positively to the responsible use of pesticides, making the act of using them near water sources particularly problematic in comparison.