Under what condition may spraying equipment used for phenix herbicides be used for other pesticides?

• A. Thoroughly cleaned
• B. Recalibrated and flushed
• C. After a pesticide-specific test
• D. Only if brand-new parts are installed

Answer: (A)

When switching from a phenoxy herbicide to another pesticide, the risk is cross-contamination. Even tiny amounts of residue left in the tank, hoses, filters, or nozzles can mix with the next product, altering its behavior, harming crops, or changing application rates. Thorough cleaning removes residues from all parts of the spray system and rinses away any lingering chemicals, making it safe to reuse the equipment with a different pesticide. This step directly addresses carryover and phytotoxicity risks, which is why it’s the best condition for reusing equipment.

Flushing and recalibration alone don’t guarantee complete residue removal, and a pesticide-specific test or installing brand-new parts isn’t required for safe reuse in most cases.