›› 2009, Vol. 52 ›› Issue (4): 395-400.

• 研究论文 • 上一篇    下一篇

温度对麦蛾柔茧蜂功能反应的影响

钟宝珠, 许再福, 覃伟权   

  • 出版日期:2009-04-20 发布日期:2009-04-20
  • 通讯作者: 许再福

Influence of temperature on functional response of Habrobracon hebetor (Say) (Hymenoptera: Braconidae) attacking larvae of Plodia interpunctella (Hübner) (Lepidoptera: Pyralidae)

  • Online:2009-04-20 Published:2009-04-20

摘要: 为明确温度变化在麦蛾柔茧蜂Habrobracon hebetor对印度谷螟Plodia interpunctella寄生作用中的影响, 研究了室内17, 20, 23, 26, 29, 32和35℃条件下, 麦蛾柔茧蜂对不同密度的印度谷螟5龄幼虫的麻痹和寄生作用。结果表明: 在17~29℃范围内, 寄生蜂的寄主处理时间与温度成反比, 从17℃的0.341 d到29℃的0.068 d, 但温度再升高时, 处理时间又延长。寄主搜索率也随温度的改变而变化, 17℃时最低, 为0.056; 29℃时最高, 为1.895; 当温度升高到32~35℃时, 寄主搜索率又下降。温度调节的功能反应模型表明, 在26~29℃范围内, 寄生率较高。可见, 在26~29℃时, 麦蛾柔茧蜂对印度谷螟有较好的寄生效果, 对寄生蜂繁殖后代有利。

关键词: 麦蛾柔茧蜂, 印度谷螟, 寄生, 功能反应, 温度

Abstract: In order to clarify the influence of temperature on the parasitism of Habrobracon hebetor (Say), the paralysis and the parasitism of the parasitoid H. hebetor as a biological control agent against Indian meal moth, Plodia interpunctella (Hübner), were determined at 17, 20, 23, 26, 29, 32 and 35℃ in the laboratory. The functional response of H. hebetor parasitizing P. interpunctella was examined at different host densities. A functional response equation was fitted to each temperature regime. The results indicated that within the temperature range of 17 to 29℃, the handling time was inversely proportional to temperature, ranged from 0.341 d at 17℃ to 0.068 d at 29℃. But over 29℃, the handling time was extended. The instantaneous search rate changed with temperature, being the lowest at 17℃ and highest at 29℃. But over 32℃, the instantaneous search rate decreased as the temperature increased. A temperature mediated functional response equation was fitted to the data, in which the handling time was a quadratic function of temperature. Accordingly, H. hebetor can parasitize more individuals of hosts within the temperature range of 26 to 29℃, which is favorable for its reproduction.

Key words: Habrobracon hebetor, Plodia interpunctella, parasitism, functional response, temperature