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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2020年57 No.5

The predation of Menochilus sexmaculata (Coleoptera: Coccinellidae) to Thrips hawaiiensis (Thysanoptera: Thripoidae) in the laboratory
Author of the article:LI Shan-Guang;FU Bu-Li; QIU Hai-Yan;YANG Shi-You;MA Xiao-Tong; ZHOU Shi-Hao;TANG Liang-De;ZHANG Fang
Author's Workplace:The ministry of Agriculture Key Laboratory of Integrated Pest Management of Tropical Crops, Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Engineering Research Center of Tropical Crops Pest Biological Control, Haikou 571101, China; Boao Agricultural Service Center, Qionghai 571434, China; Institute of Tropical Agriculture and Forestry, Hainan University, Haikou 570228, China; College of Plant Science and Technology of Huazhong Agricultural University, Wuhan 430070, China
Key Words:Menochilus sexmaculata; Thrips hawaiiensis; predation; biocontrol
Abstract:
[Objectives]  This study aims to determine the predation of Menochilus sexmaculata against Thrips hawaiiensis and to evaluate the potential use of the ladybugs in thrips control programs. [Results]  Laboratory experiments were performed to study the functional response, searching efficiency and interfere response of M. sexmaculata to T. hawaiiensis. [Results]  The predation of M. sexmaculata showed the Holling-type II functional responses against the thrips. The 4th-instar larvae and adult of M. sexmaculata showed the highest predation capacity to 2nd-instar nymph of T. hawaiiensis, with a'/Th for 578.04 and 1 852.80 individuals, with 1/Th for 400.00 and 2 000.00 individuals per day, respectively. The predation rate of M. sexmaculata was positively related with prey densities of T. hawaiiensis, while its searching efficiency was negatively associated with prey densities. Furthermore, the elder larvae and adult of M. sexmaculata were more effective in searching for their preys than other predator ages. The predation on T. hawaiiensis was significantly influenced by the predator density of M. sexmaculata, showing that the predation rate decreased with increasing the predator density. This suggests that the interfere response exists in the predation of M. sexmaculata on T. hawaiiensis, and this could be described by Hassell-model equation. [Conclusion]  These findings represent that M. sexmaculata exhibit a great potential for its use in control of this special thrips pest, providing a scientific basis on biological control programs and nature enemy protection.
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