白菜是黑龙江省秋天主要蔬菜之一 ,双城市年种植面积在 5万ｈｍ2 以上。每年白菜蛆害非常严重 ,危害率达 10 %～30 %。采用 1.5 %敌敌畏缓释剂块防治白菜蛆害省工、无污染。农民每年都采用敌敌畏和敌百虫进行灌根防治 ,对白菜污染严重 ,现在人民生活水平提高了 ,喜食无公害蔬菜 Cabbage is one of the main vegetables in autumn in Heilongjiang Province, double city annual planting area in 50000 hm2 above. Annual cabbage maggot damage is very serious, the hazard rate of 10% to 30%. Using 1.5% dichlorvos slow release block prevention and treatment of cabbage maggot workers, pollution-free. Every year, farmers use dichlorvos and trichlorfon to irrigate their roots. The cabbage is polluted seriously. Nowadays, people’s living standards are improved. They like to eat pollution-free vegetables