Some weed species are developing resistance to different products within the same herbicide family. ALS inhibitors kill weeds by preventing weeds from producing essential amino acids. This winter, Purdue weed specialists documented the state's first ALS-resistant shattercane in southern Indiana. If you have this problem, or shattercane resistance to ALS herbicides develops in your field, one alternative control measure is to use the grass herbicides in a conventional soybean system. Medlin said farmers have other weed control weapons at their disposal.
Scout fields regularly, identify weeds and respond quickly.
Apply herbicides intended for weeds present in the field, and use the products only when necessary. Rotate crops to disrupt weed cycles. Apply herbicides of different chemistries as a tank mixture or sequential application during the same season for the same weed. Combine herbicide treatments with cultivation in fields with minimal soil erosion concerns. Clean tillage and harvest equipment to keep weeds from moving to other fields.