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利用生命表评价白蛾周氏啮小蜂对美国白蛾的控制作用
引用本文:魏建荣,杨忠岐,苏智.利用生命表评价白蛾周氏啮小蜂对美国白蛾的控制作用[J].昆虫学报,2003,46(3):318-324.
作者姓名:魏建荣  杨忠岐  苏智
作者单位:中国林业科学研究院森林生态环境与保护研究所,北京,100091
基金项目:国家杰出青年科学基金项目(39625020);原国家林业部重点课题(96-52)
摘    要:为了研究白蛾周氏啮小蜂对侵入性害虫-美国白蛾的控制作用,在山东省烟台市美国白蛾发生区,选择美国白蛾发生程度中等的两块样地,一块样地作为释放白蛾周氏啮小蜂防治美国白蛾的防治区,另一块样地作为对照区。应用生命表技术,连续2年共4代对美国白蛾种群数量进行定点观察。防治区每代美国白蛾在化蛹初期和化蛹盛期各放蜂1次,即每代美国白蛾共放蜂2次。将2年的第1代和第2代观测数据分别综合平均,制成4个生命表。结果表明,在放蜂防治区,第1代和第2代美国白蛾的种群趋势指数(I)分别为0.29和0.14,说明下代美国白蛾种群数量将急剧下降;放蜂区的I值显著小于对照区的8.74和4.48。生命表研究结果清楚地表明,通过人工释放白蛾周氏啮小蜂能够达到良好的控制美国白蛾的效果。

关 键 词:美国白蛾  白蛾周氏啮小蜂  生命表  生物防治  
文章编号:0454-6296(2003)03-0318-07
修稿时间:2002年6月18日

Use of life table to evaluate control of the fall webworm by the parasitoid Chouioia cunea (Hymenoptera:Eulophidae)
WEI Jian-Rong,YANG Zhong-Qi,SU Zhi.Use of life table to evaluate control of the fall webworm by the parasitoid Chouioia cunea (Hymenoptera:Eulophidae)[J].Acta Entomologica Sinica,2003,46(3):318-324.
Authors:WEI Jian-Rong  YANG Zhong-Qi  SU Zhi
Abstract:In order to evaluate biocontrol effect of an invasive pest,the fall webworm Hyphantria cunea, by the parasitoid Chouioia cunea(Hymenoptera: Eulophidae), life tables of four generations of the pest were consecutively studied for two years in Yantai, Shandong Province. Two experimental sites were selected where the fall webworm was still a big problem but not so serious as some years ago. In one of the sites the parasitoid was released twice in each fall webworm generation , at the beginning and peak period of pupation, while the other site served as the control. The average data of observations for the 1st generations of the fall webworm in two years were combined to make one life table for the test site and the average data of the observations for the 2nd generation of fall webworm were used to make another life table. Similarly, the average data of observations from the control site were used to make two other life tables. The results show that the trend indexes of population (I-value) of 1st and 2nd generations of the fall webworm at the test site, 0.29 and 0.14 respectively, were significantly lower than that at the control site, 8.74 and 4.48 respectively. The pest population clearly declined at the test site and appeared to have been effectively controlled by the parasitoid.
Keywords:Hyphantria cunea  Chouioia cunea  life table  biological control
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