随着蔬菜保护地面积的逐年扩大,保护地病虫害防治工作也越来越显得重要了。近几年,逐步发展起来的重要害虫——温室白粉虱是目前冬、春季京郊菜区的主要害虫。温室白粉虱(即人们常说的小白蛾子)的种群,在一般的生产温室内,常常以各种虫态同时存在。成虫、若虫均以刺吸式口器吸食植物的汁液,不仅严重影响植株的生长发育,同时由于排出大量“密露”,引起煤污病、污染叶片和果实,可造成减产5—50%,甚至70— With the year-by-year expansion of the area protected by vegetables, pest control in protected areas is also becoming more and more important. In recent years, the major insect pest gradually developed - greenhouse whitefly is the main pest in the suburbs of Beijing and Beijing in winter and spring. Greenhouse whitefly (that is, people often say that the white moth) population, in the general production of greenhouse, often in various forms simultaneously. Adult and nymphs are all sucking the juice of the plants by the sucking mouthparts, which not only seriously affect the growth and development of the plants, but also cause the coal pollution, pollution of the leaves and fruits due to the excretion of a large number of " Even 70-