东亚小花蝽对黄胸蓟马的室内捕食作用研究
Predation of Orius sauteri on Thrips hawaiiensis in the laboratory
付步礼1** 邱海燕1 李 强1 孙衍汤2 周世豪2 杨石有2 李善光1 唐良德1
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DOI：10.7679/j.issn.2095-1353.2019.011
作者单位：1. 中国热带农业科学院环境与植物保护研究所，农业农村部热带作物有害生物综合治理重点实验室，海南省热带作物 病虫害生物防治工程技术研究中心，海口571101；2. 海南大学热带农林学院，海口570228
中文关键词： 东亚小花蝽；黄胸蓟马；生物防治；捕食作用
英文关键词：Orius sauteri; Thrips hawaiiensis; biological control; predation
中文摘要：
【目的】 为明确东亚小花蝽Orius sauteri对黄胸蓟马Thrips hawaiiensis的捕食作用及生物防治潜能。【方法】 室内系统研究了东亚小花蝽不同虫态对黄胸蓟马不同虫态的捕食功能反应、寻找效应、自身密度的干扰反应与捕食选择性。【结果】 东亚小花蝽对黄胸蓟马的捕食功能反应符合HollingⅡ型，东亚小花蝽5龄若虫与成虫分别对黄胸蓟马2龄若虫和成虫的捕食能力（a'/Th）最强，分别为126.64头和64.30头，捕食上限（1/Th）最大，分别为149.25头/d和84.75头/d。东亚小花蝽对黄胸蓟马的捕食量与黄胸蓟马猎物密度正相关，但寻找效应与猎物密度呈负相关，东亚小花蝽高龄若虫与成虫对黄胸蓟马表现出较高的寻找效应。东亚小花蝽对黄胸蓟马的捕食作用同时受自身密度的影响，随着天敌密度的增大，平均捕食率随之降低，表明东亚小花蝽对黄胸蓟马的捕食作用存在较强的种内干扰反应，该反应符合Hassell模型方程。捕食选择性试验表明，东亚小花蝽对黄胸蓟马2龄若虫的捕食偏好性最强，其次为成虫，对伪蛹喜好性较弱。【结论】 东亚小花蝽对黄胸蓟马具有较强的捕食能力，所获研究结果为正确评价东亚小花蝽对黄胸蓟马的生防潜能提供了理论依据。
英文摘要： [Objectives] To
evaluate the potential of Orius sauteri as a biological control for the
thrip Thrips hawaiiensis. [Methods] The functional
response, search efficiency, interference response and prey preferences, of O. sauteri preying on T. hawaiiensis were observed under
laboratory conditions. [Results] Predation of O. sauteri on T. hawaiiensis followed a Holling-type II
functional response. The highest predation rates were recorded for 5th-instar
nymphs and adults of O. sauteri preying on 2nd-instar nymphs and adults of T.
hawaiiensis, which had a'/Th values of 126.64 and 64.30 individuals and 1/Th for
149.25 and 84.75 individuals per day, respectively. Predation rate was positively
correlated with prey
density but there was a negative relationship between search efficiency and
prey density. 5th-instar
nymphs and adults of O. sauteri were more effective in prey searching than other developmental stages.
Mean predation rate decreased with increasing predator density, which suggests that intraspecific
interference adversely affects predation efficiency at high predator densities
and that the relationship between predation rate and predator density approximates a Hassell-model equation. A choice-test indicated that O. sauteri has a strong preference for 2nd-instar
nymphs of T. hawaiiensis, followed by adults, and a
relatively low preference for pupae. [Conclusion]
O. sauteri is an effective predator of T. hawaiiensis. These results
provide a theoretical basis for
evaluating the potential of O. sauteri as
a biological control for T. hawaiiensis.