Always use small quantities to check for compatibility.
Check compatibility as follows. In a clean, transparent jar, add the water and other products, one by one, in the same proportion as the proposed application. Agitate gently. Let the jar sit for 30 minutes. Incompatible products will form flakes, sludge, gels or other precipitates. A separation or layering may appear.
Note: a compatibility test will only reveal physical incompatibility between products in a tank mix; it will not reveal any other form of antagonism, such as products inactivating one another or the potential for phytotoxicity. The only way to know for sure is to apply the mix to a few test plants and keep an eye on them over the season.
