Pesticides should not be used at which of the following conditions?

Pesticides should not be used at rates higher than directed by the label because doing so can lead to several negative consequences. Using higher rates than specified can increase the risk of crop damage, non-target organism harm, and environmental contamination. Label directions are established based on extensive research and testing to ensure both efficacy and safety. Adhering to these guidelines helps to minimize the risk of pesticide resistance developing in pests, avoid harm to beneficial insects and wildlife, and protect water quality by reducing runoff and leaching of chemicals into waterways.

While utilizing pesticides at less than label rates or at intervals longer than those specified can also be inappropriate under certain circumstances, they don't pose as significant a risk as applying higher than recommended rates. In some cases, using a reduced rate might still achieve some level of pest control, though it may not be as effective, and extending intervals may simply prolong the effect of the pesticide rather than causing harm. However, exceeding the label rates unequivocally risks greater harm to both the environment and the effectiveness of the pest management strategy. Therefore, the appropriate and responsible use of pesticides remains critical in managing aquatic and agricultural pest populations safely and effectively.