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近年来,随着保护地栽培面积的扩大,白粉虱的发生危害也逐年上升,现已成为蔬菜、花卉、瓜类等作物的主要害虫。白粉虱主要是刺吸作物的汁液,使叶片褪绿色变黄以至萎蔫,使光合作用降低,直接影响作物的生长发育而造成减产,而且它还分泌蜜露污染叶片和果实,导致霉菌寄生繁衍,直接影响到产品的质量。同时它也是作物多种病害的传播者。因此,防治白粉虱不可忽视。白粉虱的防治应认真贯彻“预防为主,综合防治”的原则。其主要技术如下:一、农业防治:(1)在播种或移苗之前,要彻底清除棚内及棚外周边的杂草和残株
In recent years, with the expansion of cultivated area, the occurrence of whitefly also increased year by year, and now it has become a major pest of crops such as vegetables, flowers and melons. Whitefly is mainly sucking the juice of crops, causing the leaves to fade greenish yellow and wilting, reducing the photosynthesis, directly affecting the growth and development of the crops and reducing production, and it also secretes the nectar to pollute the leaves and fruits, resulting in the parasitic reproduction of molds, Directly affect the quality of the product. At the same time it is also the spread of many diseases of crops. Therefore, prevention and control of whiteflies can not be ignored. Prevention and control of whitefly should conscientiously implement the principle of “prevention first, comprehensive prevention and control”. Its main technologies are as follows: First, agricultural control: (1) before sowing or transplanting, we must completely remove the weeds and stumps around shed and shed