温度和寄主密度对雅脊金小蜂寄生和刺死米象幼虫的影响（英文）

›› 2006, Vol. 49 ›› Issue (4): 636-642.doi:

温度和寄主密度对雅脊金小蜂寄生和刺死米象幼虫的影响（英文）

高燕，张中润，许再福^*

（华南农业大学资源环境学院，广州510640）

出版日期:2006-09-28 发布日期:2006-08-20
通讯作者: 许再福

Effects of temperature and host density on parasitizing and host-feeding of Theocolax elegans (Hymenoptera: Pteromalidae) to Sitophilus oryzae(Coleoptera: Curculionidae) in stored wheat (In English)

GAO Yan, ZHANG Zhong-Run, XU Zai-Fu

College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China

Online:2006-09-28 Published:2006-08-20
Contact: XU Zai-Fu

摘要/Abstract

摘要： 本文通过研究雅脊金小蜂Theocolax elegans在6个不同温度梯度下对米象Sitophilus oryzae幼虫的寄生和取食能力，评价了雅脊金小蜂对米象的控制效果。雅脊金小蜂寄生米象的功能反应结果表明，在17℃～29℃的温度范围内，寄生蜂的寄主处理时间与温度成反比，从0.333天（17℃）到0.063天（29℃）。寄主搜索率也随温度变化而变化，17℃时最低（0.083头/天），26℃时最高（1.521头/天）；当温度升高到29℃，寄主搜索率略有下降；但当温度升高到32℃，寄主搜索率明显下降。温度调节的功能反应模型表明，在26℃～29℃的温度范围内，寄生率较高。所以，在26℃～29℃时，雅脊金小蜂对米象有较好的控制效果。

关键词: 雅脊金小蜂, 米象, 温度, 生物防治, 功能反应

Abstract: The larval-pupa parasitoid Theocolax elegans was evaluated as a biological control agent against the rice weevil, Sitophilus oryzae, in stored wheat. The parasitization and host-feeding of the parasitoid at six constant temperatures (17-32℃) were determined in the laboratory. The functional response of T. elegans parasitizing S. oryzae was examined over a range of temperatures and host densities. A functional response equation was fitted to each temperature regime. Within the temperature range of 17℃ to 29℃, the handling time was inversely proportional to temperature, and ranged from 0.333 d at 17℃ to 0.063 d at 29℃. Instantaneous search rate also changed with temperature and was the lowest at 17℃ and highest at 26℃. But over 29℃, the instantaneous search rate decreased significantly as the temperature increased. A temperature-mediated functional response equation was fitted to the data, in which handing time was a quadratic function of temperature. T. elegans can parasitize greater numbers of hosts within the temperature range of 26℃ to 29℃.

Key words: Theocolax elegans, Sitophilus oryzae; temperature, biological control, functional response

高燕，张中润，许再福^*. 温度和寄主密度对雅脊金小蜂寄生和刺死米象幼虫的影响（英文）[J]. , 2006, 49(4): 636-642.

GAO Yan, ZHANG Zhong-Run, XU Zai-Fu. Effects of temperature and host density on parasitizing and host-feeding of Theocolax elegans (Hymenoptera: Pteromalidae) to Sitophilus oryzae(Coleoptera: Curculionidae) in stored wheat (In English)[J]. , 2006, 49(4): 636-642.

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