Barnyardgrass is a summer annual weed that can actively compete with corn and soybean crops for space and nutrients. Read the latest news and weed management information on barnyardgrass.
Barnyardgrass appearing in fields early in the growing season can remove high amounts of potassium, phosphorus and especially nitrogen from the soil. Later-emerging plants are generally smaller and susceptible to crop shading, so barnyardgrass usually does not present a serious competitive threat late in the season.
Heavy stands of barnyardgrass can remove 60 percent to 80 percent of the soil nitrogen in a crop area.2
According to WeedScience.org
*Resistance confirmation does not necessarily include all weeds and may vary among different areas of each state.
Joe Armstrong, field scientist at Corteva Agriscience, says:
For postemergence control in corn and soybeans, growers can apply Durango® DMA® herbicide; however, it should be applied when the weeds are 4 inches or shorter in height.
More information can be found through these weed science resources:
1U.S. Department of Agriculture Natural Resources and Conservation Service. Plants Database. http://plants.usda.gov/core/profile?symbol=ECCR
2Lanini, W. T., and B. A. Wertz. Barnyardgrass. Penn State University. http://extension.psu.edu/pests/weeds/weed-id/barnyardgrass
Keystone NXT is a federally Restricted Use Pesticides. Durango DMA, Keystone NXT, Sonic, SureStart II, and Surveil are not registered for sale or use in all states. Keystone NXT and SureStart II are not available for sale, distribution or use in Nassau and Suffolk counties in the state of New York. Contact your state pesticide regulatory agency to determine if a product is registered for sale or use in your state. Always read and follow label directions.