一、害虫的越冬规律。掌握害虫的冬眠规律是冬春防治害虫的关键。害虫的生活习性和抗寒能力不同,越冬的虫态和场所也不同,例如:有的害虫以卵越冬。如菜蚜,以卵在花椒,石榴,木槿,夏枯草等寄主上越冬;蝗虫在江河堤堰,田埂,荒山等土中越冬。有的害虫以幼虫越冬。如棉铃虫以蛹在棉田内越冬;柑桔凤蝶以蛹在柑桔或其它植物叶背、枝条上越冬;菜青虫的蛹常隐藏在墙 First, the pest’s overwintering rules. To master the pest hibernation law is the key to winter pest control pests. Pest habits and cold resistance are different, overwintering state and place are different, for example: Some pests to the winter with eggs. Such as aphids, eggs in the pepper, pomegranate, hibiscus, Prunella and other hosts overwintering; locusts in the dike in the river, frogs, barren hills and other soil winter. Some pests overwinter with larvae. Such as the cotton bollworm pupa in the winter in the cotton field; citrus butterfly to pupae in citrus or other plants on the back, branches overwintering; cabbage worm pupa often hidden in the wall