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山药褐斑病又称山药白涩病、叶枯病、斑纹病。此病主要为害山药的叶片和茎枝,严重时造成叶片干枯和茎蔓枯死。近年来,山药褐斑病有不断加重的趋势。为此,笔者于2000～2002年对此病的症状及发生特点进行了观察,并开展了药剂防治试验。1症状病害主要发生在叶片上。发病初期叶面上
Yam brown spot, also known as yam white astringent disease, leaf blight, stripe disease. The disease is mainly harmful to yam leaves and stems, causing severe dry leaves and stems and leaves dead. In recent years, yam brown spots continue to increase the trend. To this end, the author in 2000 and 2002 on the symptoms of the disease and the occurrence of characteristics were observed, and carried out drug control trials. 1 Symptoms The disease occurs mainly on the leaves. Early onset of foliar