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一、病害的症状 1.炭疽病 可侵染叶片和茎蔓,高温多雨季节发病重。在叶片上,初在叶尖或叶缘处形成暗绿色水渍状小斑点,后扩大为褐色至黑褐色的圆形或不规则的大斑。病斑中部褪为灰褐色或灰白色,上有不规则轮纹,温度高时病斑表面有黑色或粉红色小粒点。茎蔓受害,初在茎上产生褐色小点,后扩大成圆形或不规则形下陷的病斑,中间灰白色,四周为黑色,严重时,病斑融合成片,导致茎蔓干枯。
First, the symptoms of disease 1. Anthracnose can invade the leaves and stems and vines, high temperature and heavy rainy season. On the leaves, the beginning of the leaf tip or leaf margin at the formation of dark green water-like small spots, enlarged to brown to dark brown after the round or irregular large spot. Lesions central spot faded brown or gray, irregular wheel pattern, the surface temperature of the lesion is black or pink small particles. Stem vine damage, the beginning of the stem to produce brown spots, enlarged into a round or irregular shape after the subsidence of the lesion, the middle of the gray, surrounded by black, severe, the lesion merged into tablets, resulting in dry stem and vine.