大蒜叶枯病俗称“火风”,是大蒜的主要病害,近年在什邡县大蒜产区发生较为普遍,危害很重,并常常造成大蒜产量和产值严重下降。重发年发病株率高达70％以上,一般减产4—5成。一、发生危害症状及病因大蒜叶枯病表现为下部叶片桔黄、萎蔫、绿叶片数减少。病叶的病组织一般从下部叶片尖端顺中脉或单侧向基部延伸,有的典型病叶微有扭曲呈“半边风”枯黄,表面可见黑色霉点。有的在其余叶片上同时伴有霜霉病危害的霜状霉 Garlic leaf blight commonly known as “fire wind” is the main disease of garlic in Shijie County in recent years occurred more common garlic producing areas, is very harmful and often results in a serious decline in output and output of garlic. The incidence of recurrence in the high incidence of more than 70%, the general cut 4-5 into. First, the occurrence of hazardous symptoms and causes Garlic leaf blight performance of the lower part of the orange leaves, wilting, reducing the number of green leaves. Sick leaves of the diseased tissue usually from the lower tip of the leaf along the midrib or unilateral to the base extension, and some typical sick leaves slightly twisted “half of the wind” yellow, black moldy surface can be seen. Some are accompanied by downy mildew at the same time as frost mildew