What should be done with drain outlets before applying rotenone?

Before applying rotenone, it is essential to close drain outlets to prevent the chemical from escaping the treatment area. Closing the outlets helps to contain the rotenone within the designated treatment water body, ensuring that it effectively targets the intended aquatic organisms without inadvertently affecting non-target areas or waterways. This containment is crucial not only for the effectiveness of the treatment but also for environmental safety, as rotenone can be harmful to aquatic life outside of the intended application area. By sealing the outlets, applicators can minimize the risk of unintentional exposure and ensure that the herbicide functions as intended. This proactive measure is a critical part of the best management practices for applying herbicides in aquatic environments.