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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2022年59 No.2

Predatory function of Geocoris ochropterus and Geocoris xishaensis
Author of the article:LI Shao-Ka WU Ming-Yue LIN Jun-Xu LI Qi-Shan FU Zhen-Shi LIN Ming-Zhi KONG Xiang-Yi ZHANG Yo
Author's Workplace:Sanya Academy of Tropical Agricultural Sciences, Sanya 572000, China; Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, China; National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya 572024, China
Key Words:Geocoris ochropterus; Geocoris xishaensis; predation preference; Megalurothrips usitatus; predation potential
Abstract:
[Objectives]  To clarify the potential of two predatory stink bugs (Geocoris ochropterus Fieber and G. xishaensis) as biological controls for the main pests of melons and vegetables in Hainan. [Methods]  The feeding preferences of the two species of stink bug with respect to common thrips, aphids, leafhoppers and nitidulids were determined, and their ability to control common thrips was evaluated. [Results]  Both stink bugs preferred common thrips to the three other pests and adult common thrips to nymphs. The predation rate of both species was highest at 28 ℃ and the maximum daily capture rates of common thrips by adult female, adult male, 4th-5th instar nymphs and 2nd-3rd instar nymphs of G. ochropterus were (49.18 ± 8.71), (47.23 ± 7.81), (43.60 ± 10.29) and (30.10 ± 4.65) ind. /day, respectively. The maximum daily capture rates of common thrips by adult female, adult male, 4th-5th instar nymphs and 2nd-3rd instar nymphs of G. xishaensis were (33.37 ± 3.89), (32.65 ± 5.12), (23.87 ± 2.37) and (27.36 ± 3.19) ind./day, respectively. [Conclusion]  Adults and nymphs of G. ochropterus and G. xishaensis are both potentially effective biological controls for the main pests of melons and vegetables. Both species prefer to prey on common thrips, and females of both species were the most effective predators of adult thrips. These findings provide a foundation for the conservation and application of G. ochropterus and G. xishaensis as biological control agents in Hainan.
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