一、害虫种类 1.蚜虫一般以成虫和若虫聚集在叶背面及心叶等部位刺吸汁液,使花椰菜叶片发黄甚至脱落,同时可传播病毒病,使植株黄化,生长缓慢,甚至死亡。 2.白粉虱喜群集于嫩叶上取食为害,被害叶片变黄,萎蔫,甚至全株枯死。白粉虱还可分泌蜜露,引起煤烟病,影响植物的呼吸及光合作用。此外还可传播病毒病。 3.小菜蛾初孵幼虫可钻入叶片组织内取食肉,2龄后 First, the pest species 1 aphids generally adults and nymphs gathered in the leaves on the back and heart leaves and other parts of the sucking juice, so that leaves of cauliflower yellow or even fall off at the same time can spread the virus disease, the plant yellow, slow growth and even death. 2. Whiteflies hi cluster on the young leaves on the feeding damage, the victim leaves yellowing, wilting, and even the whole plant died. Whitefly can also release honeydew, causing soot disease, affecting plant respiration and photosynthesis. In addition it can spread viral disease. 3. Plutella xylostella newly hatched larvae can be drilled into the leaves to take meat, 2 years after