两种不同地理种群松毛虫赤眼蜂对米蛾卵的寄生功能及数值反应

doi:10.3864/j.issn.0578-1752.2016.23.019

摘要/Abstract

摘要： 【目的】松毛虫赤眼蜂（Trichogramma dendrolimi）是目前生物防治中应用面积最大的一种寄生性天敌。不同地理种群松毛虫赤眼蜂其生物学特性存在一定差异，论文旨在明确两种不同地理种群松毛虫赤眼蜂对米蛾卵的寄生功能反应及数值反应参数，为不同地理种群赤眼蜂的应用提供参考。【方法】选择松毛虫赤眼蜂黑龙江种群（TD-HLJ）和江苏种群（TD-JS），以米蛾卵为供试寄主，研究两个地理种群松毛虫赤眼蜂对米蛾卵的寄生功能反应与数值反应，并利用种群趋势指数（I）和干扰控制作用指数（IIPC）对两个不同地理种群松毛虫赤眼蜂进行分析比较。【结果】功能反应结果表明，TD-HLJ和TD-JS种群的寄生功能反应符合HollingⅡ型方程，TD-HLJ种群最大寄生量为186.78粒/d，比TD-JS的最大寄生量高75.68粒/d。数值反应研究表明，不同米蛾卵密度对松毛虫赤眼蜂TD-HLJ和TD-JS种群的寄生、发育及繁殖有显著影响，米蛾卵密度为1粒时是TD-HLJ和TD-JS种群羽化的临界值，米蛾卵密度为5和10粒时分别是TD-HLJ和TD-JS种群繁殖的临界值。采用I和IIPC分析松毛虫赤眼蜂的控制作用，TD-HLJ和TD-JS种群的I值均随着米蛾卵密度的增加而增加，对照TD-HLJ和TD-JS种群的I值分别为68.70和49.20，即TD-HLJ种群的下一代数量比TD-JS种群的数量多19.5倍；TD-HLJ和TD-JS种群的IIPC值均随着米蛾卵密度的增加而增加，说明随着卵密度的增加，TD-HLJ和TD-JS种群对寄主卵的控制作用逐渐减小。【结论】综合功能反应和数值反应结果，松毛虫赤眼蜂TD-HLJ种群比TD-JS种群具有更好的生物防治潜能。

关键词: 松毛虫赤眼蜂, 地理种群, 米蛾卵, 功能反应, 数值反应

Abstract: 【Objective】 Trichogramma dendrolimi is a widely used parasitoid in biological control. There are some differences in different geographic populations of T. dendrolimi and its biological characteristics. This study aimed at understanding the parasitic functional response and numerical response of two typical geographic populations to eggs of the rice moth, Corcyra cephalonica so that provided a reference for the application of different geographical populations of the parasitic wasp species.【Method】 C. cephalonica eggs were used as the host, and the functional response and numerical response of two geographic populations of T. dendrolimi from Heilongjiang and Jiangsu parasitizing were investigated. The species flocks of trend index (I) and index of population control (IIPC) of the two different geographical populations were compared and analyzed.【Result】 The parasitic functional responses of Heilongjiang population (TD-HLJ) and Jiangsu population (TD-JS) of T. dendrolimi fitted in with HollingⅡ equation. The daily maximum parasitic number of TD-HLJ was 186.78 eggs, more 75.68 eggs than that of TD-JS. The density of 1 grain of C. cephalonica egg was the critical value of TD-HLJ and TD-JS populations of eclosion. The density of C. cephalonica eggs had significant impact on parasitism, development and reproduction of both populations. 5 and 10 eggs of C. cephalonica were the critical values of TD-HLJ and TD-JS population reproduction. The population trend index (I) of both populations increased with the increase of host egg density. Generally, both of populations had the values of I under the control density with 68.70 for TD-HLJ and 49.20 for TD-JS, which indicated that the number of offsprings of TD-HLJ was 19.5 times of that of TD-JS. Similarly, interference of index of population control (IIPC) of both populations increased with the increase of host egg density, indicating that the biological control effectiveness of T. dendrolimi against hosts decreased with egg density increasing.【Conclusion】 Based on the comprehensive analysis on the results of functional response and numerical response, TD-HLJ exhibits better biological control potential than TD-JS in the insect pest management.

Key words: Trichogramma dendrolimi, geographic populations, Corcyra cephalonica egg, functional response, numerical response

杜文梅，臧连生，张俊杰，祁颖慧，阮长春. 两种不同地理种群松毛虫赤眼蜂对米蛾卵的寄生功能及数值反应[J]. 中国农业科学, 2016, 49(23): 4669-4676.

DU Wen-mei, ZANG Lian-sheng, ZHANG Jun-jie, QI Ying-hui, RUAN Chang-chun. Functional Response and Numerical Response of Two Geographic Populations of Trichogramma dendrolimi to the Eggs of Rice Moth, Corcyra cephalonica[J]. Scientia Agricultura Sinica, 2016, 49(23): 4669-4676.

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