温室蔬菜覆网栽培,是指春季撤膜后,覆盖纱网(密度为30～40目的尼龙窗布)。 在沧州地区,到夏秋高温季节,是病虫害发生频繁、防治难度较大的时期,常规的防治方法是经常不断地喷施农药,致使蔬菜生产成本高、效益下降。沧州市运河区科技局引进覆网栽培实用技术,在本区小王庄镇前辛庄菜园进行了蔬菜温室覆网栽培获得成功,有效地防止了菜青虫、棉铃虫、夜蛾类等多种病虫侵入产卵。由于网眼小,害虫钻不进,切断了害虫繁殖途径,有效地抑制了害虫幼虫危害和传毒, Greenhouse covered with vegetables, refers to the spring after the film, covering gauze (30 to 40 mesh nylon fabric density). In Cangzhou, to summer and autumn hot season, pests and diseases occur frequently, prevention and control of a more difficult period, the conventional method of prevention and control is constantly spraying pesticides, resulting in high vegetable production costs, the benefits decline. Cangzhou Canal Science and Technology Bureau of the introduction of netting cultivation of practical technology, in the district Wangzhuang Zhen Qian Xinzhuang garden vegetables greenhouse cultivation, successful, effectively prevent Pieris rapae, cotton bollworm, nightworms and other pests Invaded spawn. As the mesh is small, pests do not drill into, cut off the breeding route of pests, effectively inhibit the pest larvae and poison transmission,