不同温度下南亚大眼长蝽取食小菜蛾幼虫的年龄-龄期两性生命表
Age-stage two-sex life table of Geocoris ochropterus feeding on Plutella xylostella larvae at different temperatures
高莉萍1, 2** 汪宏宇1 曹 飞1 代咏横1 王香萍1*** 张金平2***
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DOI：10.7679/j.issn.2095-1353.2026.081
作者单位：1. 长江大学，农林病虫害预警与调控湖北省工程中心，荆州 434025；2. 中国农业科学院植物保护研究所，农业农村部-CABI生物安全联合实验室，北京 100193
中文关键词：南亚大眼长蝽；小菜蛾；不同温度；年龄-龄期两性生命表；生物防治
英文关键词：Geocoris ochropterus; Plutella xylostella; different temperature; age-stage two-sex life table; biological control
中文摘要：【目的】 温度是影响天敌昆虫生长发育和繁殖的重要因素。本研究测定不同温度下南亚大眼长蝽Geocoris ochropterus以小菜蛾Plutella xylostella幼虫为食时的生长发育及繁殖情况，以期筛选出最适于南亚大眼长蝽种群饲养的温度。【方法】 本文采用年龄-龄期两性生命表方法，系统评估南亚大眼长蝽在22、24、26、28和30 ℃下取食小菜蛾幼虫时的发育历期、存活率、繁殖力及种群增长等参数。【结果】 南亚大眼长蝽在各个试验温度下均能完成整个世代发育，尤其当温度为28 ℃时，南亚大眼长蝽取食小菜蛾幼虫具有发育历期短（32.51 d）、存活率高（61%）、总产卵前期短（36.81 d）、雌性占比高（32%）以及单雌产卵量高（277.19粒）等生物学特性；同时拥有较高的净增殖率R0（88.7）、内禀增长率r（0.08/d）和周限增长率λ（1.09/d）及较短的平均世代周期T（53.88 d）。【结论】 南亚大眼长蝽在28 ℃下取食小菜蛾幼虫生长发育及繁殖最适，这一结果为今后利用小菜蛾大规模饲养南亚大眼长蝽和在田间开展小菜蛾的生物防治工作提供了理论依据。
英文摘要：[Aim] To determine the optimal temperature for raising Geocoris ochropterus, a natural enemy of Plutella xylostella. [Methods] Using an age-stage two-sex life table approach, we systematically evaluated the developmental period, survival rate, reproductive capacity, and population growth parameters of male and female G. ochropterus feeding on P. xylostella larvae at 22, 24, 26, 28, and 30 ℃ [Results] G. ochropterus could complete development at all temperatures tested. However, 28 ℃ was the optimal temperature in terms of developmental period (32.51 days), survival rate (61%), pre-oviposition period (36.81 days), proportion of females produced (32%), and female fecundity (277.19 eggs/female). The net reproductive rate was also highest at 28 ℃ (88.7 offspring), as was the intrinsic rate of increase (0.08 per day) and the finite rate of increase (1.09 per day), whereas the mean generation time was the shortest (53.88 days). [Conclusion] 28 ℃ is the optimum temperature for the development and reproduction of G. ochropterus feeding on P. xylostella larvae. This result provides a theoretical basis for improving the captive rearing of G. ochropterus and consequently the biological control of P. xylostella.