If a work order calls for a tank mix of pesticides, what must you review first?

• A. Confirm the mixing ratio with the seller.
• B. Check the weather forecast.
• C. Review the labels of all products for legal compatibility.
• D. Test spray nozzle flow.

Answer: (C)

The main idea is that the first step in a tank mix is to verify legality and compatibility from the product labels. Pesticide labels are legal documents that spell out whether two or more products can be mixed together, and under what conditions. They specify if additives or adjuvants are allowed, the correct order of mixing, the maximum concentration in the spray tank, any crop or pest restrictions, and any other restrictions related to that combination. If a label says not to tank-mix certain products or to avoid mixing on a specific crop, that combination is not allowed, regardless of what you’re hoping to do in the field. By reviewing the labels, you ensure you’re following the law, protecting crop health, and safeguarding worker safety. After confirming that the mix is permitted by the labels, you can move on to other steps like confirming mixing ratios with the seller and checking weather or equipment, but the mix can’t proceed until label compatibility is established.