葡萄白粉病是近年来广泛发生的一种难治的真菌性病害,无论鲜食葡萄还是酿酒葡萄均易受害,特别是随着鲜食葡萄面积不断增大,黄河以北地区的山东、河北和陕西的秦岭北麓受害尤其严重,不但降低葡萄的品质和产量,还影响葡萄的美观以及口感。发病原因:葡萄白粉病的病原属子囊菌亚门专性寄生的葡萄钩丝壳菌(图1),无性阶段为半知菌亚门真菌托氏葡萄粉孢霉。其有隔膜、透明的菌丝匍匐生长,多隔膜分生孢子梗与菌丝垂直密生。透明的单胞分生孢子圆筒形至卵形,呈念珠状串生。在病部表面产生的球形闭 Grape powdery mildew is a kind of hard-to-cure fungal disease that occurs widely in recent years. Both fresh-eating grapes and wine grapes are vulnerable. Especially with the increasing of fresh grapes, Shandong, Hebei and Qinling Mountains in northern foot of the victims in particular, not only reduce the quality and yield of grapes, grapes also affect the appearance and taste. The cause of the disease: grape powdery mildew pathogen belongs to the Ascomycota subtropical parasitic Gramineae hygroscopicus (Figure 1), asexual stage of the penicillinosis of the Amycovoris Torresia Turcz. Its diaphragm, transparent mycelium creeping growth, multi-membranous conidiophores and mycelium vertical hygienic. Transparent cell conidia cylindrical to ovate, was a rosary string students. Spherical closed in the surface of the disease department