中红侧沟茧蜂寄生对粘虫幼虫取食 及生长发育的影响
Effects of parasitism by Microplitis mediator (Haliday) on the feeding and development of Mythimna separata (Walker) larvae
路子云1** 马爱红1 冉红凡1 刘文旭1 刘小侠2 李建成1*** 张青文2
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DOI：10.7679/j.issn.2095-1353.2016.121
作者单位：1. 河北省农林科学院植物保护研究所，河北省农业有害生物综合防治工程技术研究中心， 农业部华北北部作物有害生物综合治理重点实验室，保定 071000；2. 中国农业大学植物保护学院 北京100092
中文关键词：中红侧沟茧蜂，粘虫，寄生，取食量，发育
英文关键词：Microplitis mediator, Mythimna separata, parasitism, food consumption, development
中文摘要：
【目的】 为明确中红侧沟茧蜂Microplitis mediator (Haliday)寄生对粘虫Mythimna separata (Walker)幼虫取食和发育的影响及评价其田间应用价值。【方法】 比较研究了中红侧沟茧蜂寄生不同日龄粘虫对粘虫幼虫取食量和发育的影响。【结果】 被寄生的粘虫4、6、8日龄幼虫与未被寄生的同龄期幼虫取食量差异达极显著水平。被寄生的4、6、8日龄粘虫幼虫间的取食量差异不显著。被寄生的幼虫，5 d前体重缓慢上升，之后缓慢下降，所有被寄生的幼虫均不能化蛹。4、6、8日龄粘虫幼虫被寄生后，中红侧沟茧蜂幼虫在其体内的发育历期不同，不同日龄间差异显著，随着日龄的增大显著缩短。【结论】 表明该蜂不仅能有效地控制粘虫当代危害，而且在很大程度上能够抑制粘虫的种群数量。
英文摘要：
[Objectives] To determine the effects of parasitism by Microplitis mediator (Haliday) on the feeding and development of Mythimna separata (Walker) larvae, and evaluate the potential of M. mediator as a biological control for M. separata. [Methods] The relative reduction in food consumption and development by M. separata larvae following parasitization by M. mediator was determined in controlled, laboratory experiments. [Results] 4, 6, and 8, day old M. separata larvae that had been parasitized by M. mediator consumed significantly less of an artificial diet than unparasitized larvae of the same age. The body weights of newly hatched, parasitized larvae increased slowly for 5 days then declined. No parasitized larvae pupated. The developmental duration of M. mediator was significantly shorter if these had parasitized older larvae. [Conclusion] M. mediator can not only reduce the damage caused by the current generation of M. separata but can also greatly reduce the abundance of this pest.