Which protective measure is crucial to prevent back siphonage during pesticide applications?

Installing check valves is crucial to prevent back siphonage during pesticide applications because these devices ensure that water flows in only one direction. Back siphonage can occur when there is a sudden drop in water pressure in a system, potentially causing contaminated water, including pesticide solutions, to flow back into the clean water supply. The installation of check valves acts as a safeguard, blocking any backflow and protecting the integrity of the water supply by maintaining separation between the pesticide application site and the potable water.

Using a regular hose may not provide the necessary protection. Regular hoses lack the mechanisms to prevent backflow, which could lead to the risk of contamination. Wearing gloves is essential for personal safety during pesticide application but does not prevent back siphonage itself. Keeping pesticides above ground level does not directly address the issue of back siphonage; it may help with safety and environmental concerns, but it does not control water flow dynamics in the application equipment. Therefore, installing check valves is the most effective method to prevent the risk associated with back siphonage.