扎兰屯市现有大棚2000多亩,设施农业在本市的农业经济中占有举足轻重的地位,每年产出的各类新鲜蔬菜,不仅满足本市人民日常饮食需求,而且销往毗邻的兴安盟、阿荣旗、莫旗等地区。由于大棚特殊的生长环境,使各种病害不断发生和蔓延,其中,黄瓜霜霉病发病迅速、扩展快、为害重,仅一两周内可造成几乎整株叶片枯死,每年都给菜农 Zhalantun City, the existing 2,000 acres of greenhouses, facilities agriculture in the city’s agricultural economy occupies a pivotal position in the annual output of various types of fresh vegetables, not only to meet the daily diet needs of the people of this city, and sold to the adjacent Xing’an League , Arong flag, Mo flag and other regions. Due to the special growth environment of greenhouses, various diseases continue to occur and spread. Among them, the incidence of cucumber downy mildew is rapid, rapid expansion and serious damage. In just one or two weeks, almost all the leaves of the cucumbers can be withered off,