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一、基本情况北京市从1974年开始试验利用赤眼蜂防治第二代玉米螟,累计放蜂面积达475万亩。1978～1980年每年放蜂面积达100万亩以上,近几年稳定在80万亩左右。从1978年,先后在密云,顺义和通县分别建立了具有一定规模的赤眼蜂生产车间三个,承担全市赤眼蜂生产任务。三个车间日繁蜂量均达1.5亿头,年产200亿多头蜂。目前,大量生产和应用的是以柞蚕卵繁殖松毛虫赤眼蜂Trichogramma dendrolimi。通县还以米蛾卵生
First, the basic situation Beijing began experimenting with Trichogramma from 1974 to control the second generation of corn borer, the cumulative discharge area of 4.75 million mu. From 1978 to 1980, the annual area of beekeeping reached over 1 million mu and remained stable at about 800,000 mu in recent years. From 1978, successively in Miyun, Shunyi and Tongxian have established a certain scale Trichogramma production workshop three, the city’s Trichogramma production tasks. The three workshops daily amount of bee reached 150 million head, with an annual output of more than 20 billion heads of bee. At present, the mass production and application of trichogramma dendrolimi is based on the tussah eggs. Tongxian meters moth eggs to students