叶子花常用来作房前屋后的垂直绿化和盆景,但在养护过程中常常因为高温高湿、通风不良和管理不善而引发病害,降低了其观赏价值。笔者经过多年的调查发现叶子花主要病害有:1.炭疽病(病原为Colletotrichumgloeosporides) 主要为害叶和嫩枝。被害部位最初出现在叶缘或叶尖,呈水渍状圆形或近圆形暗色小斑,而后逐渐向叶片内扩展井可占叶面的大部分,有的形成环状病斑。后期病斑中央灰白色,其上有许多小点粒。发病严重的植株,叶片不断脱落。病菌主要通过自然孔口或伤口侵入为害。在高温高湿、荫蔽度大、通风不良以及栽培管理差的条件下,易发生和蔓延。2.叶枯病(病原phyllostica bouginvilleae wu,Bai.et.zhang) 该病发生在叶和小侧枝上,病斑均为灰白色,叶缘干枯向上卷曲,病部具小黑点。小枝 Leaf flowers are often used to make vertical greening and bonsai in front of the house. However, diseases are often caused by the high temperature and humidity, poor ventilation and poor management during the conservation process, reducing their ornamental value. The author after many years of investigation found that the main diseases are: 1. Anthracnose (the pathogen of Colletotrichumgloeosporides) is the main damage to leaves and twigs. The victim site first appeared in the leaf margin or tip, was a water-like round or nearly circular dark patches, and then gradually expand to the leaves can account for most of the leaves, and some form annular lesions. Late lesion gray central, there are many small particles. Severe disease, leaves constantly falling off. Pathogenic bacteria mainly through the natural orifice or wound invasion. Under the conditions of high temperature and humidity, large shade degree, poor ventilation and poor cultivation and management, it is easy to occur and spread. 2. Leaf blight (pathogen phyllostica bouginvilleae wu, Bai.et.zhang) The disease occurs in the leaves and small side branches, spots are gray, leaf edge curled upward curly, diseased parts with small black spots. Sprig