What describes the best way to mix pesticides safely?

The best way to mix pesticides safely involves making sure that the water fill hose does not come into contact with the spray mix. This practice is crucial because it helps to prevent contamination and backflow of the pesticide solution into the water supply. Protecting the integrity of the water source and ensuring that pesticides do not contaminate tools or equipment are vital components of safe pesticide handling.

Considering the other options, the use of pesticide utensils for food is not acceptable, as this could expose humans to harmful chemicals. Mixing insecticides with herbicides is not advisable unless specifically designated, as different pesticides have distinct chemical properties that can lead to ineffective results or hazardous reactions when mixed without thorough understanding. Lastly, submerging the water fill hose in the tank can create a risk of backflow, which could introduce pesticides into the drinking water supply—thereby posing a significant health risk. Therefore, maintaining a safe mixing practice ensures environmental and personal safety.