褐斑病是由病菌引起的从春到秋都可为害园林植物的常见的园林病害,常见的受害植物有榆叶梅、菊花、桂花、大丽花、丁香、杜鹃、牡丹、鸡冠花、贴梗海棠、天竺葵、鸢尾、樱花、杜鹃、松树等。褐斑病从春到秋都可为害,秋季多雨,发病严重。高温高湿、植株过密均有利病害的发生。褐斑病的病斑初期被害叶上有呈现圆形或椭圆形大小不一的紫褐色病斑,后期叶片逐渐变黑,病部与健康部位分界很明显。发生严重时多数病斑相连,病株从下部叶片开始,顺次向上枯死。下面介绍 Brown spot is a common disease caused by the pathogen, which can damage garden plants from spring to autumn. The common plant diseases are Prunus triloba, Chrysanthemum, Osmanthus, Dahlia, Clove, Rhododendron, Peony, Cockscomb, , Geranium, iris, cherry, azalea, pine and so on. Brown spot can be damaging from spring to autumn, rainy autumn, the incidence is serious. High temperature and humidity, over-dense plants are conducive to the occurrence of diseases. Brown spots on the lesion early damage victims showed a circular or oval-shaped purple brown lesions of different sizes, the latter part of the leaves gradually darken, the diseased part of the boundary with the health is obvious. Serious when most of the lesions connected, the diseased plants from the lower leaves, the order up dead. Introduced below