秋季使用农药防治蔬菜害虫,要达到最佳杀虫效果,除了选准对口药剂、适期用药外,还应特别注意用药时间和部位。要根据气候特点和害虫的昼夜活动规律,选择在有利的时间施药施用农药时间以9:00-10:00和16:00后为宜。因9:00以后,作物叶片上露水已干,又正是日出性害虫活动最盛的时候。在这个时候施药,既不会因为露 Pesticides in autumn to prevent and control vegetable pests, in order to achieve the best insecticidal effect, in addition to select the right counterparts, medication, but also pay special attention to medication time and site. According to the climate characteristics and pest day-and-night patterns of activity, choose the time of pesticide application in favorable time to 9: 00-10: 00 and after 16:00 is appropriate. After 9:00, the dew on the leaves of the crops has dried up, and it is also the time when the sunrise pests are at their peak. Apply at this time, neither because of dew