大量散放金小蜂(黑青小蜂)Dibrachys cavus(Walker)可以防治棉仓越冬红铃虫。放蜂数量充分,时期适当,寄生率可以很高,红铃虫活虫率可以很低。 然而,棉仓放蜂之后,对抑低田间为害的作用究竟如何?同时,此蜂自然寄主多达150种以上,其中包括大批有益的寄生蜂与寄蝇,放蜂之后,对其余昆虫作用如何?均有待探明。为此于1963— A large number of small golden bee (black buzzard) Dibrachys cavus (Walker) can control cotton bollworm overwintering. The number of amphibious bees is sufficient, the period is appropriate, the parasitism rate can be very high, and the live insects rate of red bollworm can be very low. However, what is the effect of reducing the field damage after the cotton bins have been bee-pollinated? At the same time, the bees naturally host as many as 150 species, including a large number of useful parasitic and parasitic flies, All have to be proved. To this end in 1963-