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一、病毒病:又称花叶病,病株幼叶上呈现深浅绿色相间的花叶,重病株上部叶片畸形呈鸡爪状,植株矮化,叶片变小,后期叶片枯黄或死亡。病株结瓜少或不结瓜,瓜面有瘤状突起或畸形。该病在温度高、缺水、缺肥、管理粗放、蚜虫和温室白粉虱大量发生的大棚内发病重。防治措施:1、加强管理,施足底肥,培育壮苗,保持适宜的温度和湿度。如果在苗期发现少数病株,可拔出棚外,更换新壮苗,盛果期发现病株,可单独进行施药防治。2、及时防治蚜虫和温室白粉虱,控制此类害虫的传播,可用敌敌畏烟熏剂熏蒸,也可用20%灭扫利
First, the virus disease: also known as mosaic disease, diseased young leaves appear shades of green and white mosaic flowers, sick strains of the upper leaf deformed chicken foot-like, dwarf plants, smaller leaves, the late yellowish leaves or death. Less diseased strains or fruiting cucumbers, melons nodular processes or deformities. The disease in the high temperature, lack of water, lack of fertilizer, extensive management, aphids and greenhouse whitefly large incidence of severe disease within the shed. Prevention and control measures: 1, to strengthen management, Shi enough base fertilizer, nurturing strong seedlings, to maintain proper temperature and humidity. If you find a small number of diseased plants in seedling stage, you can pull out the shed, replace the new strong seedlings, Sheng fruit period found diseased plants, can be applied separately for prevention and treatment. 2, timely prevention and control of aphids and greenhouse whitefly, control the spread of such pests, available fumigation of fumigation of dichlorvos, but also available 20% off Lee