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地黄在整个生长期间病害较多,对产量影响较人,有的年份造成大幅度减产。根据几年来的试验观察,先介绍几种叶部的主要病,病害及共防治。斑枯病:本病是山一种真菌Septoriadigitalis Pass.引起的病害,发生普遍,危害严重,往往使成片植株的叶子卷缩、枯焦。被害叶部病斑成园形、近园形,或受叶脉限制成不规则形,褐色或深褐色。直径3～13毫米,有时有轮纹,易和轮纹病混淆。病斑有肉眼可见的小黑点,即病原菌的分生孢
Rehmannia more disease throughout the growth period, the impact on the production of more people, some years resulted in a significant cut. According to several years of experimental observation, first introduced several kinds of leaf disease, disease and prevention and treatment. Spot Blight: The disease is a disease caused by the fungus Septoriadigitalis Pass, a common and devastating disease that often leaves the leaves of adult plants crimped and scorched. Injured leaf lesions into a circular park, near the park-shaped, or restricted by the veins into an irregular shape, brown or dark brown. Diameter of 3 ~ 13 mm, sometimes with round pattern, easy to be confused with rotifers. Lesions have macroscopic black spots, that is, the pathogen of conidia