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Rye Cover Crop Offers Weed Suppression in Edamame

A study by University of Illinois and USDA Agricultural Research Service demonstrated that early-terminated rye provided weed suppression in edamame without harming crop yield. However, in tests with snap beans, the cover crop reduced weed biomass by about half but also reduced crop yield. In tests with lima beans, the rye cover crop both failed to suppress weeds and led to decreased crop yield, which the researchers attributed to poor crop establishment. The researchers say the rye cover crop alone doesn’t provide adequate weed control for edamame, but it could work well in combination with other weed-management strategies.