当前正是棉铃虫、菜青虫、甜菜夜蛾等鳞翅目害虫大发生的时期,广大菜农可依据下述方法尽快防治,控制其危害。一、人工防治在成虫产卵初盛期开始人工摘除卵块并销毁。二、物理防治 1.黑光灯诱杀利用成虫趋光性,每30～50亩地置一盏黑光灯于田间植株等高处,于灯下放缸或盆,装入半盆(缸)水,水面上滴少量煤油或放入少量90%敌百虫结晶,诱使成中落到水面上即会死亡。 The current is the bollworm, Pieris rapae, beet armyworm lepidopteran pests and other large period of time, the majority of farmers can be based on the following methods to prevent and control as soon as possible to control their harm. First, the artificial prevention and treatment of adult eggs in the early spawning period of artificial removal of eggs and destroyed. Second, the physical control 1. Black light trap use adult phototaxis, every 30 ~ 50 acres of land to set a black light in the field plant height, the lamp placed in the tank or basin, into the basin (cylinder) water, water droplets A small amount of kerosene or into a small amount of 90% trichlorfon crystallization, induced into mid-water will die.