| 张 琛1#, 周金成1#, 杨 帅1, 张龙喜1, 张柱亭2, 宁素芳1, 董前进1, 董 辉1*.短期冷藏米蛾卵对草地贪夜蛾天敌短管赤眼蜂繁育质量的影响[J].植物保护,2019,45(5):37-41. |
| 短期冷藏米蛾卵对草地贪夜蛾天敌短管赤眼蜂繁育质量的影响 |
| Effect of short-term cold storage of Corcyra cephalonica eggs on the quality ofTrichogramma pretiosum used for the control of Spodoptera frugiperda |
| 投稿时间：2019-08-12 修订日期：2019-08-17 |
| DOI：DOI: 10.16688/j.zwbh.2019405 |
| 中文关键词: 短管赤眼蜂 草地贪夜蛾 米蛾卵 低温冷藏 大规模繁育 |
| 英文关键词:Trichogramma pretiosum Spodoptera frugiperda Corcyra cephalonica eggs cold storage mass-rearing |
| 基金项目:国家重点研发计划(2017YFD0201000) |
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| 中文摘要: |
| 草地贪夜蛾Spodoptera frugiperda原产于美洲, 是目前严重威胁我国粮食生产安全的重大入侵害虫。短管赤眼蜂Trichogramma pretiosum是草地贪夜蛾原产地重要天敌。我国早在1979年便已引进短管赤眼蜂, 但尚未大规模应用。利用短期冷藏替代寄主卵繁育赤眼蜂等天敌可延长其“货架期”。为明确短期冷藏米蛾卵对短管赤眼蜂质量及防控效能的影响, 本文研究了米蛾卵在4℃下冷藏0 d(对照)、7 d和14 d后育出的短管赤眼蜂子代的发育历期、羽化率、个体大小、繁殖力、耐饥饿时间及对草地贪夜蛾卵的室内寄生率。结果表明:短时冷藏的米蛾卵对育出的短管赤眼蜂质量产生一定负面影响, 主要表现在繁殖力下降和个体偏小, 但其发育历期、羽化率和耐饥饿能力不受影响。冷藏7 d的米蛾卵育出的子代蜂对草地贪夜蛾卵的寄生率与对照组相比无显著差异, 但冷藏14 d的米蛾卵育出的子代蜂对草地贪夜蛾卵的寄生能力明显衰退。本研究说明, 米蛾卵冷藏7 d对育出的短管赤眼蜂寄生草地贪夜蛾卵的效能影响不大。研究结果将为以米蛾卵作为替代寄主大规模繁育短管赤眼蜂提供重要参考。 |
| 英文摘要: |
| Spodoptera frugiperda, a species native to the Americas, is a new dangerous invasive pest threatening the crop production of China. Trichogramma pretiosum is one of the most important natural enemies against S.frugiperda in Americas. This Trichogramma species has been introduced in China since 1979, but has not been widely used. To clarify effects of short-term cold storage of Corcyra cephalonica eggs on the quality of T.pretiosum, we investigated the development time, emergence rate, body size, starvation tolerance time, and parasitic efficacy of T.pretiosum cultured with C.cephalonica eggs stored at 4℃ for 0 d (control group), 7 d and 14 d against S.frugiperda eggs. The results showed that cold storage of host eggs negatively affected body size and fecundity of T.pretiosum offspring, but showed no effect on the development time, emergence rate, and starvation tolerance time of T.pretiosum offspring. The parasitic rate of T.pretiosum offspring against S.frugiperda eggs was not decreased when host eggs stored for 7 d, but significantly declined when offspring emerged from the host eggs stored at 4℃ for 14 d. Our study will supply a basic reference for the mass-rearing of introduced T.pretiosum against S.frugiperda. |
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