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1975年我们对赤眼蜂中间寄主卵的保鲜问题进行了研究,同时对利用自然低温育蜂和成蜂饲养作了初步试验与观察。 一、保鲜试验 我省防治稻纵卷叶螟、稻苞虫以及稻螟蛉等,以澳洲赤眼蜂、松毛虫赤眼蜂利用较多。繁蜂所用的中间寄主,主要是柞蚕卵与蓖麻蚕卵。本试验的柞蚕来自河南,蓖麻蚕主要来自广西玉林。取回蚕茧部分让其自然化蛾,部分放7—9℃冰箱中保存,分期取出化蛾取卵。现分述如下:
In 1975, we studied the preservation of the host eggs of Trichogramma, and conducted preliminary experiments and observations on the use of natural low-temperature breeding and adult feeding. First, the preservation test in our province to prevent rice leaf roller, rice shell insects and rice borer, etc., Trichogramma Australia, Trichogramma Trichogramma more use. The intermediate hosts used by the bumble bees are mainly tussah eggs and castor silkworm eggs. The test of tussah from Henan, castor silkworm mainly from Guangxi Yulin. Retrieve part of the silkworm cocoon to let it natural moths, some put 7-9 ℃ refrigerator to save, remove moths oocyte. Now as follows: