斑马万年青属天南星科观叶植物,是广大人民群众颇为喜爱的花卉之一。但常因养护不当,日久天长植株逐渐变弱,极易引发病害。其中尤以炭疽病危害较重,且主要危害成叶、嫩枝,严重时导致整个叶片干枯脱落,影响观赏价值。下面笔者结合实践,谈谈该病的病症及其防治:一、病症:发病初期,病害部位最初出现在叶缘或叶尖,呈水渍状圆形或近圆形暗褐色小斑,而后逐渐扩大成不规则的斑块,颜色变为焦黄色,个别病斑呈云片状,边缘有浅红色晕圈;到后期病斑中央变为灰白色,上有许多微小黑点,病症逐渐向基部扩展,严重时全叶枯黑脱落。其原因主要是炭疽病菌通过自然孔口或伤口入侵为害。在遇到潮湿的气候条件下,病部出现深褐色小点,即为病菌的子实体。 Evergreen zebra is a Southern Star foliage plants, is the majority of people is quite one of the favorite flowers. But often due to improper maintenance, growing plants gradually weakened, easily lead to disease. Among them, anthrax is particularly harmful, and the main hazard is leaf and shoot. In severe cases, the whole leaves are dry and fall, affecting the ornamental value. The following combination of practice, the author talked about the disease and its prevention and treatment: First, the disease: the early stages of disease, the disease occurred in the first part of the leaf margin or tip, was a water-like round or nearly circular dark brown spots, and then gradually Expand into irregular plaques, the color into a yellowish, some lesions were cloud-like, the edge of a light red halo; to the late lesion central gray, there are many small black spots, the disease gradually extended to the base , Severe whole leaf black off. The main reason is that anthrax bacteria invade through natural or wound damage. In the face of humid climates, dark spots appear dark spots, which is a fruiting body of bacteria.