一、特征描述及防治方法甜瓜细菌性果斑病的病原细菌在种子、土表越冬,可通过风雨、昆虫、农事操作传播,从伤口和气孔侵染。带菌种子萌发后,病菌从子叶侵入,引起幼苗发病。同时,病原细菌还会侵染西葫芦、南瓜、西瓜、黄瓜等作物。棚内高温、高湿易发病。值得注意的是,该病的病原细菌侵染果实时,在甜瓜坐果后1—3周的幼果期通过果皮上的皮孔侵入。一旦幼瓜开始转色、果皮表面形成蜡粉,则大多数皮孔封闭,能有效阻止细菌继续侵入。所 First, the characteristics and methods of prevention and control Melon bacterial fruit spot disease pathogenic bacteria in the seeds, soil surface overwintering, can be transmitted through the wind and rain, insects, agricultural operations, from wounds and stomatal infection. After the germination of the fungus seeds, the bacteria invade from the cotyledons and cause the emergence of seedlings. At the same time, the pathogenic bacteria will also infect zucchini, pumpkin, watermelon, cucumber and other crops. Shed high temperature, high humidity prone disease. It is noteworthy that the pathogen of the disease infects the fruit through the lenticels of the pericarp during the young 1-3 weeks after fruit setting. Once the cucumber began to turn color, the formation of wax skin peel, the majority of lenticels closed, can effectively prevent the bacteria continue to invade. The