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对不同地区不同生长年限沙打旺的根腐病发病率、病情指数进行了调查,并通过田间调查和室内试验对病原菌进行了分离、培养、鉴定和致病性测定。
The incidence and disease index of root rot of Astragalus adsurgens in different growing years were investigated, and the pathogens were isolated, cultured, identified and pathogenic tested by field investigation and laboratory tests.