What should be done if endangered or threatened species may be affected by an aquatic pesticide application?

• A. Apply only during designated windows near habitat.
• B. Follow any no-spray zones on the label.
• C. Use a higher application rate to reduce exposure.
• D. Avoid application, obtain required consultations under the Endangered Species Act, and follow any no-spray zones on the label.

Answer: (D)

When endangered or threatened species could be affected by an aquatic pesticide, the priority is to prevent harm through formal regulatory steps and strict label adherence. The Endangered Species Act requires you to pause and engage in consultations with the appropriate agency (US Fish and Wildlife Service or NOAA Fisheries) to assess potential effects and identify measures to avoid or minimize harm. Depending on the outcome, you may need to adjust timing, location, or obtain an incidental take permit, but these steps must be completed before proceeding. In addition, you must follow any no-spray zones on the pesticide label to protect listed species and their habitats. If possible, avoiding application altogether is the safest path to prevent harm. Simply applying within designated windows does not satisfy ESA consultation requirements or label restrictions, and increasing the application rate would only raise exposure.