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近年来,随着日光温室蔬菜的发展,为白粉虱的发生提供了有利条件,温室白粉虱危害日趋严重。 白粉虱在北方冬季露地条件下不能存活,主要在温室寄主上繁殖危害。春季和初夏,白粉虱由移栽的菜苗传带和成虫扩散,迁移到春大棚和露地蔬菜上。秋季温度内白粉虱的来源有3条途径:1.露地育苗时,幼苗受白粉虱侵染,移栽时传入温室;2.温室内混栽的蔬菜和残存杂草上寄生的白粉虱;3.秋大棚及露地寄主植物上的白粉虱成虫经门窗和通风口迁入温室。完成周年循环。白粉虱的防治应重点做好冬春季节温室虫源的防治工作。
In recent years, with the development of vegetables in solar greenhouse, it provides favorable conditions for the occurrence of whiteflies, and the harm of whitefly in greenhouse is becoming more and more serious. Whiteflies can not survive under winter conditions in the north and mainly reproduce in the greenhouse. Spring and early summer, whitefly by the transplanted seedlings and adults spread, migrate to the spring and open field vegetables. There are three sources of whiteflies in the autumn temperature: 1. When the seedlings are exposed to the whitefly in the open field, the seedlings are infected by the whitefly, which is transferred into the greenhouse when transplanted; 2. The whiteflies parasitized by the mixed vegetables in the greenhouse and the remaining weeds; 3. autumn greenhouses and open host plants on the whitefly adults via doors and windows and vents moved to the greenhouse. Complete the anniversary cycle. Prevention and treatment of whitefly should focus on prevention and treatment of greenhouse insects in winter and spring.