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应用赤眼蜂防治农林害虫,全国放蜂面积达一千万亩左右,均取得良好效果。目前,在北京郊区主要应用松毛虫赤眼蜂;近三年来,每年放蜂面积达一百万亩左右,螟卵寄生率达70—80%。为了探索松毛虫赤眼蜂在田间搜索寄主的能力、寄主效果和它同田间玉米螟赤眼蜂的竞争能力,我们使用了比度为25μCi/ml 的~(32)P 蜜糖水直接饲喂而标记赤眼蜂的方法,对蜂无不良影响,
Trichogramma applied to the prevention and control of agricultural and forestry pests, the country put the bee area of 10 million mu, have achieved good results. At present, Trichogramma Trichogramma is mainly used in the suburbs of Beijing. In the past three years, the annual area of larvae has reached about 1 million mu and the parasitism rate reaches 70-80%. To explore the ability of the Trichogramma trichogramma to search for hosts in the field, the host effect, and its ability to compete with the Trichogramma ostriniae in the field, we fed directly with ~ (32) P honey water at 25 μCi / ml Trichomonas beetle method, no adverse effects on the bee,