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一、白粉病1.发病症状主要侵害叶片,开始发病时叶片正反面产生圆形的白色病斑,逐渐发展扩大,以致覆盖整个叶片,叶片上盖满白色粉状物,后期在病部散生许多小黑点,叶片干枯脱落。果实受害时在果面产生粉状霉
First, the powdery mildew 1. Symptoms of the main attack on the leaves, the beginning of the incidence of positive and negative leaves produce round white lesions, and gradually expanded to cover the entire leaves, the leaves covered with white powder, the late sick in the sick Many black spots, leaves dry off. When the fruit is damaged, there is powdery mildew on the fruit surface