欢迎访问《应用生态学报》官方网站,今天是 分享到:

应用生态学报

• 研究报告 • 上一篇    下一篇

高温对玉米螟赤眼蜂实验种群的影响

陈科伟;周靖;龚静;何余容;黄寿山   

  1. 华南农业大学昆虫学系, 广州 510642
  • 收稿日期:2005-07-29 修回日期:2006-04-20 出版日期:2006-07-18 发布日期:2006-07-18

Effects of high temperature on laboratory Trichogramma ostriniae population

CHEN Kewei; ZHOU Jing; GONG Jing; HE Yurong; HUANG Shoushan   

  1. Department of Entomology, South China Agricultural University, Guangzhou 510642, China
  • Received:2005-07-29 Revised:2006-04-20 Online:2006-07-18 Published:2006-07-18

摘要: 以米蛾卵为繁育寄主,组建了玉米螟赤眼蜂在26、29、32和35 ℃下的实验种群生命表,探讨了高温对玉米螟赤眼蜂生长和生殖的影响.结果表明,高温32 ℃~35 ℃对玉米螟赤眼蜂各虫态的生长发育有明显的抑制作用.卵幼虫的存活率在26 ℃和29 ℃分别为 94.2%和88.6%,32 ℃时下降至80.2%,而35 ℃时仅为53.2%,蛹的存活率也表现出相应的下降趋势.玉米螟赤眼蜂羽化后12 h内的抱卵量、体长及卵粒大小随温度的升高而减少或变小.26 ℃时,玉米螟赤眼蜂羽化后0~12 h的抱卵量为37.9粒,随着温度的升高,抱卵量急剧下降,29 ℃、32 ℃和35 ℃的抱卵量分别为29.6、21.6和13.7粒.在26 ℃及29 ℃时,所有雌蜂均能进行正常交配和产卵,32 ℃时有6.7%的个体不产卵,至35 ℃时,则有60%的个体不能进行正常的生殖活动.

关键词: 群落结构, 蒙古栎, 次生林, 优势树种, 空间分布格局

Abstract: In this paper, the life tables of laboratory Trichogramma ostriniae population reared on Corcyra cephalonica eggs at 26 ℃, 29 ℃, 32 ℃ and 35 ℃ were constructed, and the effects of high temperature on the development and reproduction of this population were analyzed. The results showed that high temperature (32 ℃~35 ℃) greatly affected the development of T. ostriniae. The egg-larva survival rate was 94.2% at 26 ℃ and 88.6% at 29 ℃, and decreased to 80.1% at 32 ℃ and 53.2% at 35 ℃. The pupa survival rate also descended with the raise of temperature. The egg load and the body-and egg sizes of newly emerged female wasps were negatively responded to temperature. 12 h-old adult female had an egg load of 37.9, which was decreased with the raise of temperature, and about 29.6, 21.6 and 13.7 mature eggs were found at 29 ℃, 32 ℃ and 35 ℃, respectively. All females could complete their normal copulation and oviposition at 26 ℃ and 29 ℃, but about 6.7% and 60% females could not reproduce at 32 ℃ and 35 ℃, respectively.

Key words: spatial distribution pattern., Quercus mongolica, secondary forest, dominant species, community structure