夏季是叶菜类蔬菜上多种害虫混合发生、集中危害的重要时期,根据植保部门调查预测,今年的花菜、青菜等叶菜类蔬菜上的小菜蛾、菜青虫达到中等偏重发生程度,部分地区烟粉虱、猿叶虫等害虫也是如此,害虫发生期比常年明显推迟。为有效控制叶菜类蔬菜上害虫的危 In summer, it is an important period for a variety of pests to be mixed and concentrated in leafy vegetables. According to the investigation and forecast of plant protection departments, the population of diamondback moth and cabbage on leafy vegetables such as cauliflower and green vegetables in this year has reached a moderate degree of emphasis. In some areas Bemisia tabaci, pest and other pests, too, pest occurrence significantly delayed than usual. In order to effectively control the pests of leafy vegetables on the danger