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1980—1984年在山西省夏县五年的试验结果表明,3月下旬至4月中旬在菜园每亩释放10000—15000头松毛虫赤眼蜂(Trichogramma dendrolimi),小地老虎(Agrotis ypsilon)卵的寄生率可达73.91—80.76％;整个生长季节,其它蔬菜害虫卵的寄生率也比不放蜂菜园的显著为高。 放蜂菜园的毗邻棉田,6—8月棉铃虫(Heliothis armigera)和小造桥虫(Anomis flava)卵的赤眼蜂寄生率,分别为66.0—80.76％和60.69—80.71％;不放蜂菜园的毗邻棉田,寄生率都很低。 利用菜园早期接种释放赤眼蜂,可以大量增加农田生态系统中赤眼蜂的种群。一亩菜地能繁蜂70万头,对多种菜虫和棉虫都起到良好的控制作用。1983—1984年夏县每年菜园放蜂面积达4000亩,受益的毗邻棉田为21000亩。
From 1980 to 1984, Xiaxian County in Shanxi Province for five years showed that 10,000 to 15,000 Trichogramma dendrolimi and Agrotis ypsilon eggs were released per mu in the vegetable garden in late March to mid-April. Of the parasitism rate of up to 73.91-80.76%; throughout the growing season, the parasitism rate of other vegetable pests eggs was also significantly higher than the bee garden. The parasitism rates of Trichogramma were 66.0-80.76% and 60.69-80.71% respectively in the cotton fields adjacent to the bee-keeping garden, Heliothis armigera from June to August and eggs from Anomis flava respectively; Adjacent to cotton fields, parasitic rates are low. Trichogramma population can be significantly increased by the early trichocarpus trichogramma inoculation in the vegetable garden. One acre of vegetable plots to bee 700,000, on a variety of cabbage and cotton insects play a good control. In 1983-1984, the annual area of summer vegetable gardens in Qixian County reached 4,000 mu, benefiting 21,000 mu of adjacent cotton fields.