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扬州地区菜蚜有桃蚜Myzus persicae、萝卜蚜Lipaphis erysimi、甘蓝蚜Brevicoryne brassicae三种,是十字花科蔬菜的重要害虫。目前防治菜蚜依赖于化学农药。开拓菜蚜的防治新措施,实现蔬菜无公害,已成当务之急。从1980年起我们对菜蚜的天敌资源及其作用效应进行了调查与研究,以期对菜蚜的综合防治提供些依据。试验方法菜蚜天敌调查工作在本院农场、扬州市双桥公社青菜、包菜田中进行。每5—7天调查一次,按对角线五点取样,每点10株系统记载蚜量,天敌种类及数量。蚜茧蜂是在田间调查僵蚜率,并采回僵蚜在室内饲养统计其数量及种类。另外,在田间设置10×8厘米的玻质诱捕器20个,棋盘形排列,每天清晨及傍晚检查步行虫,隐翅虫的种类及数量。各种天敌的生物学特性及捕食功能大多在室内养虫笼内进行。
Yangzhou area aphids Myzus persicae Myzus persicae, turnip aphids Lipaphis erysimi, cabbage aphids Brevicoryne brassicae three species, is cruciferous vegetables important pests. At present, the control of aphids depends on chemical pesticides. Development of aphids new measures to prevent and control, to achieve pollution-free vegetables, has become a top priority. Since 1980, we investigated and studied the natural enemies resources and their effects of aphids in order to provide some evidences for the comprehensive control of aphids. Test methods aphids natural enemies survey work in our hospital farm, Yangzhou Shuangqiao commune vegetables, vegetable fields in the box. Investigate once every 5-7 days and sample at five points on the diagonal. Each point of 10 strains records the amount of aphids and the number of natural enemies. The aphid Braconidae is investigating the rate of aphid in the field and retrieving the number and species of aphid infestations indoors. In addition, in the field set 10 × 8 cm glass trap 20, checkerboard arrangement, early morning and evening every morning to check the pest, the number and types of pest insects. Most of the biological characteristics of predators and predatory function in the cage in the cage.