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斑痔悬茧蜂对甜菜夜蛾幼虫龄期的选择及其生长发育的研究
  • ISSN号:1000-2030
  • 期刊名称:《南京农业大学学报》
  • 时间:0
  • 分类:S763.306.4[农业科学—森林保护学;农业科学—林学]
  • 作者机构:[1]南京农业大学农业部病虫监测与治理重点开放实验室,江苏南京210095
  • 相关基金:国家自然科学基金资助项目(30370237)
中文摘要:

在室内采用非选择性和选择性试验,研究了斑痣悬茧蜂(Meteorus pulchricornis)对不同龄期甜菜夜蛾(Spodoptera exigua)幼虫的选择以及后代的生长发育表现。在非选择性试验中,斑痣悬茧蜂虽然寄生所有1-5龄幼虫,但寄生率不同,对2-4龄幼虫的寄生率(〉70%)显著高于对1龄(53%)和5龄(20%)幼虫的寄生;寄生不同龄期寄主幼虫的后代寄生蜂生长发育表现亦存在差异,寄生2-4龄寄主幼虫的寄生蜂结茧化蛹率(〉95%)和羽化率(〉90%)高于寄生1龄和5龄幼虫的,而发育历期短于寄生1龄和5龄幼虫的;但后代寄生蜂成虫的体型(用后足胫节长度表示)随寄主幼虫龄期增长而逐渐增大。由此表明,甜菜夜蛾2-4龄幼虫对斑痣悬茧蜂的生长发育适合度表现更有利。在成对选择试验中,当5龄幼虫不在供选寄主组合中时,斑痣悬茧蜂喜好龄期较大的寄主幼虫,即最喜好4龄幼虫,最不喜好1龄幼虫;在4龄与5龄幼虫之间倾向于选择4龄幼虫,这与非选择性试验得出的结论基本一致。

英文摘要:

In order to understand oviposition strategy of the uniparental endoparasitoid Meteorus pulchricornis on host larvae of the beet armyworm Spodoptera exigua, non-choice and paired choice experiments were conducted in the laboratory. Parasitism on different instar larvae and development performance of the parasitoid offspring were observed. In the non-choice experiment, though all five instars of host larvae were susceptible to parasitization, the parasitism differed in that the 2-4 instals were significantly parasitized ( 〉70% ) than the first instar (53%) and the fifth instar (20%). The development performance of offspring parasitoids was also different among host instars where parastization commenced. Parasitoid larvae pupated ( 〉 95 % ) after egression and adulls eclosed ( 〉 90% ), derived from eggs oviposited in 2-4 instar hosts, more than those from eggs oviposited in the first and the fifth instar hosts. Larval development time of the parasitoid, measured from oviposition to adult eclosion, was shorter for the 2-4 instar hosts than the first and the fifth instar hosts where eggs were deposited. Body sizes of offspring parasitoids, represented by hind tibia length, increased with host instars where the parasitization commenced. Combined fitness returns for the parasitoid showed that the second through the fourth instar hosts were more suitable for its development. In the paired-choice experiment, M. pulchricornis preferred older hosts to the young but the inverse occurred when the fifth instar host was offered, which was consistent with the conclusion from the non-choice experiment.

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期刊信息
  • 《南京农业大学学报》
  • 北大核心期刊(2011版)
  • 主管单位:中华人民共和国教育部
  • 主办单位:南京农业大学
  • 主编:郑小波
  • 地址:江苏省南京市卫岗1号
  • 邮编:210095
  • 邮箱:nauxb@njau.edu.cn
  • 电话:025-84395214
  • 国际标准刊号:ISSN:1000-2030
  • 国内统一刊号:ISSN:32-1148/S
  • 邮发代号:28-53
  • 获奖情况:
  • 中国自然科学核心期刊,全国优秀科技期刊,第二届江苏省十佳科技期刊,中国期刊方阵“双效”期刊
  • 国内外数据库收录:
  • 美国化学文摘(网络版),英国农业与生物科学研究中心文摘,波兰哥白尼索引,英国动物学记录,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊(2004版),中国北大核心期刊(2008版),中国北大核心期刊(2011版),中国北大核心期刊(2014版),中国北大核心期刊(2000版)
  • 被引量:22558