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一、疫病(真菌性病害)1、典型症状。叶片病斑呈圆形或近圆形,边缘黄绿色,中央暗褐色;果实染病始于蒂部,初生暗绿色水浸斑,迅速变褐软腐,湿度大时表面长出白色霉层,干燥后形成暗褐色僵果,残留在枝上;茎和枝染病,病斑初为水浸状,后出现环线表皮扩展的褐色或黑褐色条斑,病部以上枝叶迅速凋萎。2、发病条件。易积水的地,定植过密,通风透光不良易发病。3、防治措施。苗期选用萎菌净800倍液喷
First, the disease (fungal diseases) 1, the typical symptoms. Leaf lesion was round or nearly circular, the edge of the yellow-green, dark brown central; fruit disease began in the pedicle, the first dark green water spot, rapid brown soft rot, humidity, the surface grow white mildew, dry After the formation of dark brown stiff fruit, remain in the branches; stems and branches disease, the lesion was initially flooded, after the ring epidermis expanded brown or dark brown streaks, diseased branches and leaves above withered rapidly. 2, the incidence of conditions. Easy to accumulate water, planting too dense, poor ventilation and easy to disease. 3, prevention and control measures. Selective use of seedling net 800 times spray