Preemergence weed control is encouraged, but few options are available in small grains. During the NDSU Agronomy Seed Farm plot tour, NDSU Extension weed scientist Kirk Howatt spoke about a trial where he is using Sharpen against preemergence products that are used in other crops. The goal is to encourage registration of new options in small grains. “Sharpen, applied at two-and-a-half to three ounces preemergence, was more effective than several of the other preemergence herbicides used in corn, soybean, other commodities,” said Howatt.. “We usually think of Sharpen as just killing weeds that are present before the crop emerges, but if we keep that rate up above two fluid ounces of product, we get very good soil residual on certain weeds.” Waterhemp and pigweeds are very susceptible to Sharpen and similar products.
Subscribe to RRFN
Get a weekly digest from RRFN to stay up-to-date on all the latest news in agriculture.