Nozzle discharge rate and sprayer calibration should be checked with clean water BEFORE adding pesticide.

Checking the nozzle discharge rate and sprayer calibration with clean water before adding pesticide is a crucial step in ensuring safety and effectiveness in pest control applications. This practice allows applicators to verify that the sprayer is functioning correctly and delivering the intended volume of fluid at the desired pressure. Using clean water eliminates the risk of chemical reactions or contamination that could occur if pesticides were introduced prematurely.

By confirming that the equipment is calibrated properly with water, applicators can ensure that they will achieve accurate pesticide application rates, which is essential for maximizing efficacy while minimizing potential harm to non-target organisms and the environment. This process also helps in identifying any issues with the sprayer, such as clogs or leaks, so they can be addressed before the application of potentially hazardous materials. Therefore, conducting this check with clean water first is both a safety precaution and a best practice in pest management.