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寄主龄期和温度对管侧沟茧蜂寄生的影响

王金耀;屈振刚   

  1. 河北省农林科学院植物保护研究所, 保定 071000
  • 收稿日期:2004-01-19 修回日期:1900-01-01 出版日期:2005-05-08 发布日期:2005-05-08

Selection on Host Size and Reproduction Ability of Microplitis tuberculifer

WANG Jin-yao;QU Zhen-gang   

  1. Institute of Plant Protection, Hebei Academy of Agricultural & Forestry Sciences, Baoding 071000, China
  • Received:2004-01-19 Revised:1900-01-01 Online:2005-05-08 Published:2005-05-08

摘要: 就管侧沟茧蜂对寄主龄期的选择、生殖能力、成蜂寿命及后代性比进行了研究。结果表明,管侧沟茧蜂偏爱寄生粘虫的1~2龄幼虫,3龄以上幼虫很少被寄生。对1、2、3龄幼虫的选择系数分别为0.42、0.54、0.05。管侧沟茧蜂羽化当天就能交配寄生,在19~25℃条件下单雌平均寄生30头幼虫,最多89头;雌蜂平均寿命6d,最长13d;后代雌雄性比为1∶1.02~1∶1.27。

Abstract: Selection on host age and size, reproduction ability, adult longevity and offspring sex ratio of Microplitis tuberculifer were studied. The results indicated M. tuberculifer preferred to parasitize the 1st or 2nd instar of Pseudaletia separata larvae. The selection indice of M.tuberculifer on 1st, 2nd and 3rd instar P.separata larvae were 0.42, 0.54 and 0.05 respectively, but it didn't parasitize the larvae over 3rd instar. The wasp could copulate and parasitize on the day of its eclosion. At 19-25℃, one female wasp could parasitize 30 M. tuberculifer larvae on average, 89 larvae at most. Under this temperature range, longevity of female wasp was 6d on average and 13d at most, and its offspring sex ratio (♀∶♂) was 1∶1.02-1∶1.27.

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