从蓝萤叶甲分离出的大型微粒子孢子对家蚕的胚种传染性研究

STUDIES ON THE TRANSOVARIAN TRANSMISSION IN THE SILKWORM OF LARGE MICROSPORIDIA ISOLATED FROM THE PHYLLOBROTICA ARMATA BALY

从蓝萤叶甲分离收集到的大型微粒于孢子（简称蓝叶虫微粒子），感染寄生家蚕后能引起胚种传染，但初次感染后引起的胚种传染率很低，对次代蚕群体生长发育的影响也很小，混育感染可使下一代蚕儿大部分被感染。经过两次继代传染以后，其胚种传染率大大地提高，从而使下一代蚕儿因直接的胚种传染或间接的混育传染全部在蚕期发微粒子病而死去。

The transovarian transmission in the silkworm of large microsporidia isolated fromthe Phyllobrotica armata Baly was demonstrated in our experiment through oral inocula-tion.The ratio of transovarian transmission caused by the primary infection was verylow and the growth and development of the silkworm progeny was normal,but most ofthe silkworm progeny were infected by the microsporidia due to mixed infection. The pe-brine contamination rate in the silkworm increased largely after twice transovariantransmission and almost all the silkworms died during the larval stage because of transo-varian transmission or mixed infection.