目前露天蔬菜上发生危害的病虫害主要有斜纹夜蛾、甜菜夜蛾、烟粉虱、红蜘蛛和白粉病。夏季的高温干旱对露天蔬菜上的斜纹夜蛾、甜菜夜蛾、烟粉虱、红蜘蛛、白粉病的发生和为害非常有利,高温干旱既加快了这些病虫的发育进程和流行蔓延速度,加重了病虫的发生量和为害程度;特别是斜纹夜蛾、甜菜夜蛾、烟粉虱、红蜘蛛发生代次多、发生期长、为害蔬菜品种多,造成损失重;同 At present, the main pests of pests in open-air vegetables are Spodoptera exigua, beet armyworm, whitefly, red spider and powdery mildew. Summer high temperature and drought on open-pit vegetables Spodoptera, beet armyworm, Bemisia tabaci, spider mite, powdery mildew occurrence and damage are very favorable, high temperature and drought not only accelerated the development of these pests and the spread of the epidemic, increased The occurrence of pests and pests and the degree of harm; especially Spodoptera litura, beet armyworm, Bemisia tabaci, spider mite occurred more frequently, the occurrence period is long, more harmful varieties of vegetables, resulting in heavy losses; with