Control of brown spot by mixed cultivation of Medicago sativa and Elymus nutans

The cultivating mode greatly affected the morbidity and extent of harm from brown spot in alfalfa. By contrast test between the mixed cultivation of Medicago sativa and Elymus nutans and the monoculture of M. sativa, the results indicated that the morbidity and severity of brown spot in alfalfa under the mixed cultivation were reduced by 7.02 and 16.8 percentage units respectively comparing with the monoculture, and it was an efficient ecological method to control the brown spot in alfalfa.