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近几年来,我们以保护利用天敌为前提,进行了棉花苗蚜综合防治试验示范,取得了良好效果。苗期施药量可减少三分之二以上,不仅降低了防治成本,而且保证了棉花正常生长,保护了大量天敌,为蕾铃期害虫的综合防治奠定了基础。一、防治措施及其效果 (一)种植诱集作物(油菜诱集带): 棉田种植油菜诱集带,具有招引天敌的作用,并为其在棉田繁殖创造条件。方法是每6—8米开一条15厘米深的沟,镇压保墒,在棉花播种10—15天前种甘蓝型油菜一行(每亩需油菜籽半两左右),油菜行中间播8—10行棉花。油菜要适当间苗,并注意加强管理。
In recent years, we have taken the protection and utilization of natural enemies as the prerequisite, conducted a comprehensive demonstration of cotton seedling aphid control experiments and achieved good results. The application of seedling can be reduced by more than two thirds, not only reducing the cost of prevention and treatment but also ensuring the normal growth of cotton and protecting a large number of natural enemies, laying the foundation for the comprehensive prevention and treatment of pests in the budding stage. I. Prevention and Control Measures and Effects (I) Cultivation of Trapping Crops (Rape Trap): Rape traps are planted in cotton fields to attract natural enemies and create conditions for breeding in cotton fields. The method is to open a 15 cm deep furrow every 6-8 meters to suppress soil moisture and plant a row of rapeseed rapeseed (about half a dozen of rapeseed per acre) 10-15 days before cotton sowing. cotton. Rape should be appropriate between seedlings, and pay attention to strengthening management.