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金小蜂Dibrachys cavus Wilk.属于金小蜂科Pteromalidae,是仓库里越冬红铃虫的一种寄生性天敌,分布很广,利用它来防治仓库里的越冬红铃虫还是史无前例的尝试。我们于1955年开始采种研究,1958年利用,1960年推广到全国主要棉区,效果良好。据全国13个省市30余处的不完全统计,放蜂的仓库内,越冬红铃虫的被寄生率平均为90％,最高100％,最低60％,在棉田内第一代红铃虫为害花朵的数量较不放蜂的棉区平均降低75％左右。
It belongs to the genus Pteromalidae. It is a kind of parasitic natural enemies of the overwintering red bollworm in the warehouse. It is widely distributed and it is an unprecedented attempt to prevent and cure overwintering red bollworm in the warehouse. We started the study of seed collection in 1955 and utilized it in 1958. In 1960, it was extended to major cotton areas in the country and the effect was good. According to the incomplete statistics of more than 30 departments in 13 provinces and cities nationwide, the parasitism rate of overwintering red bollworm was 90%, 100% and 60% respectively at the average. The first generation of red bollworm Damage to the number of flowers less than the average cotton area bee drop about 75%.