0引言近几年,温室蔬菜的发展为白粉虱提供了有利的越冬条件。冬季温度低,白粉虱在室外不能存活,但是能以各种虫态在温室越冬并继续为害,春季气温升高又由温室迁飞到露地为害,繁殖虫源基数越来越大。由于温室蔬菜种植茬口多,温室和露地蔬菜茬次衔接和相互交替,白粉虱可以周年发生,导致温室白粉虱分布广、为害重。 0 Introduction In recent years, the development of greenhouse vegetables provides favorable winter conditions for whiteflies. Winter temperature is low, whiteflies can not survive outdoors, but in a variety of insect states in the greenhouse overwinter and continue to damage the spring temperature and moved from the greenhouse to the open field damage, increasing the base of breeding insects. As greenhouse vegetable stubble more greenhouses and open vegetable stubble secondary convergence and mutual alternation, whitefly can occur annually, resulting in greenhouse whitefly wide distribution, serious damage.