Written collaboratively by Eric Jones, Graig Reicks, Philip Rozeboom, Jill Alms and David Vos.
Herbicide mixtures are recommended to increase the management of multiple weed species and reduce selection pressure on herbicide-resistant weeds all while reducing the number of applications during a growing season. While herbicide mixtures are effective, the order in which herbicides are added to the spray tank can influence the activity. Some herbicides may not be compatible for mixing, which can result in a gel, sludge, and/or precipitates that can clog nozzles/screens as well as antagonize the performance of the herbicides. Herbicide labels state language if herbicide(s) have some incompatibility when mixed. However, if no language is present, a jar test can be conducted to determine if herbicides are compatible.
