丽草蛉三龄幼虫对斜纹夜蛾卵及低龄幼虫的捕食作用

doi:10.16409/j.cnki.2095-039x.2021.11.009

摘要/Abstract

摘要： 为探明丽草蛉对斜纹夜蛾的捕食作用，本研究在室内测定了丽草蛉3龄幼虫对斜纹夜蛾卵和低龄幼虫的捕食能力及其功能反应。结果表明，丽草蛉3龄幼虫对斜纹夜蛾的卵及1龄、2龄和3龄幼虫均表现出积极捕食行为和较强的捕食能力，其捕食功能反应符合Holling II型，模型可信度较高。猎物的龄期和密度能显著影响丽草蛉的捕食能力，随斜纹夜蛾龄期增大，丽草蛉3龄幼虫的日均最大捕食量、对猎物的攻击系数和控害效能均显著下降，但对猎物的处理时间明显延长；当斜纹夜蛾密度增加时，丽草蛉3龄幼虫的捕食效率逐渐下降。综合各项捕食作用参数，丽草蛉3龄幼虫对斜纹夜蛾卵的捕食能力最高，其理论日最大捕食量为313.7粒，控害效能为23.5；其次是对斜纹夜蛾1龄幼虫，其理论日最大捕食量为130.5头，控害效能为9.9。本研究结果证实了丽草蛉是斜纹夜蛾卵和低龄幼虫的重要天敌，且具较高的控害潜能，可用于斜纹夜蛾的生物防治。

关键词: 丽草蛉, 斜纹夜蛾, 捕食能力, 功能反应, 生物防治

Abstract: To investigate the predation of the tobacco caterpillar Spodoptera litura by Chrysopa formosa, we studied the predatory capacity and functional response of C. formosa third instar larvae to eggs and young larvae of S. litura in the laboratory. The third instar larvae of C. formosa exhibited positive feeding behaviors and high predatory capacity to S. litura eggs, first, second and third instar larvae. The predators showed a type II functional response to all the tested stages of S. litura. Both age and density of prey had a significant effect on the predatory capacity of C. formosa. With the increase of prey age, the maximum daily predation, attacking rate and control efficiency of the green lacewing decreased obviously, and the handling time was distinctly prolonged. A significant decrease in predatory efficiency was noted for C. formosa with the increase numbers of S. litura. According to all parameters of the functional responses, the third instar larvae of C. formosa predated the most on S. litura eggs, with the maximum daily predation of 313.7, and the predatory efficiency of 23.5. The second highest predation was noted on the first instar larvae of S. litura, with the maximum daily predation and predatory efficiency of 130.5 and 9.9, respectively. Our results indicate that the green lacewing C. formosa has a potential to be used as biocontrol agent against this Noctuid pest.

Key words: Chrysopa formosa, Spodoptera litura, predatory capacity, functional response, biological control

中图分类号:

S476.2

王亚南, 李萍, 贺玮玮, 张茂森, 王孟卿, 毛建军, 张礼生, 李玉艳. 丽草蛉三龄幼虫对斜纹夜蛾卵及低龄幼虫的捕食作用[J]. 中国生物防治学报, 2022, 38(2): 321-327.

WANG Yanan, LI Ping, HE Weiwei, ZHANG Maosen, WANG Mengqing, MAO Jianjun, ZHANG Lisheng, LI Yuyan. Predation of the Eggs and Young Larvae of Spodoptera litura by the Third Instar Larvae of Chrysopa formosa[J]. Chinese Journal of Biological Control, 2022, 38(2): 321-327.

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