河北省农科院蚕桑研究所经三年来的试验与生产应用,以蓖麻蚕卵为材科,研制出长期保存赤眼蜂寄主卵的新技术。该技术是将寄主卵处理到适宜卵龄,经低温予冷平衡后,将其投入液氮 (-196℃) 中保存,用时取出,用低温空气化冻。结果表明:用该技术保存300天的寄主卵,接蜂后寄生率达50——70％,羽化率达80-90％。 Hebei Academy of Agricultural Sciences sericulture Institute after three years of trial and production applications to castor silkworm eggs for the subjects, developed a long-term preservation Trichogramma host egg new technology. The technology is to deal with the host egg to a suitable age of eggs, cold to the cold balance, the liquid nitrogen (-196 ℃) to save, remove with time, with low temperature air thawing. The results showed that the host eggs stored for 300 days using this technique had a parasitic rate of 50-70% and a emergence rate of 80-90% after beekeeping.