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西瓜的主要病虫害主要有猝倒病、炭疽病、蔓枯病、枯萎病、病毒病和蝇、叶螨、瓜蚜、美洲斑潜蝇等。一、农业防治1.清洁田园。一是清除瓜田附近的杂草,减小害虫前期可利用的寄主,且瓜田施用化学农药后未杀死的害虫少了一个藏身之地,像西瓜花叶病毒寄主范围较广,害虫危害杂草后可能带毒进入瓜田;二是注意清除西瓜的病株,西瓜的枯萎病、病毒病一旦感染发病便无法治愈,应将病株拔除,集中深埋或烧毁,不要随手丢弃在沟内或路边,以防人为将病菌传染给其它健康西瓜植株,且病株会继续传染,因为枯萎病病菌可在病残体上存活10年之久。
The main pests and diseases of watermelon are damping-off disease, anthracnose, gummy blight, wilt disease, virus disease and fly, spider mite, melon aphid, leaf blotch and so on. First, agricultural control 1. Clean the pastoral. First, the removal of weeds near melon fields, reduce the pre-pests available host, and melon fields after the application of chemical pesticides did not kill pests less a hiding place, like watermelon mosaic virus host a wider range of pests harm weeds May lead to poison melon into the fields; the second is to pay attention to the removal of watermelon diseased plants, watermelon wilt disease once infected with the disease can not be cured, the diseased plants should be removed, concentrated buried or burned, do not readily discarded in the trench or road Edge, in order to prevent human infection of other healthy watermelon plants, and the disease will continue to spread the disease, because the pathogen Fusarium wilt can survive in the disease for 10 years.