Which statement about pesticide equipment cleanup is false?

The statement regarding leftover pesticide residue in the spray tank being permitted when changing products is indeed false because proper pesticide equipment cleanup is critical to avoid cross-contamination between different products. Depending on the active ingredients, even a small amount of residue can react negatively or diminish the effectiveness of the new pesticide being used. Cleaning guidelines typically dictate that tanks must be thoroughly rinsed and any residues must be completely removed to ensure safety and efficacy.

In contrast, the other statements are based on standard practices for pesticide equipment maintenance. Thorough rinsing with a water-detergent solution is essential to eliminate pesticide traces. Adding lightweight oil to the tank can help protect the internal components of the sprayer during storage after cleaning. Multiple rinses are recommended as part of a thorough cleanup process to ensure all residual pesticides are eliminated, which is a best practice in maintaining pesticide application equipment. These efforts contribute to safety, effectiveness in pest control, and environmental protection.