近期,果农纷纷反映,蚧壳虫在果园又开始猖獗。往年果农用了很多药,效果都不佳,年年喷药,年年治,越治越严重。为啥蚧壳虫这么难防?原因有三:一、蚧壳虫背上有硬壳,药难达虫体蚧壳虫有个共同点——即背上产生蜡质,初孵若虫3天后,背上即产生蜡质并逐渐增厚。一般的杀虫剂很难渗透蜡质进入虫体,故而难防。 Recently, fruit farmers have reported that scale insects in the orchard began to rampant. In previous years, farmers used a lot of medicine, the effect is not good, every year spraying, every year, the more the more serious treatment. Why scale insects so difficult to prevent? There are three reasons: First, scale insects on the back of a hard shell, refractory to insects scale insects have one thing in common - the back of waxy, 3 days after the newly hatched nymphs, The back is waxy and gradually thickening. General insecticide is difficult to penetrate wax into the body, it is difficult to prevent.