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Issue:ISSN 2095-1353
           CN 11-6020/Q
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Your Position :Home->Past Journals Catalog->2017年54 No.2

Selection and risk assessment of spinetoram resistance in Thrips hawaiiensis
Author of the article:FU Bu-Li1, 3** XIA Xi-Ya1, 4 LI Qiang1, 3 QIU Hai-Yan1 TANG Liang-De1 XIE Yi-Xian1 ZEND D
Author's Workplace:1. Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; 2. The Ministry of Agriculture Key Laboratory of Intergrated Pest Management of Tropical Crops, Haikou 571101, China; 3. Key Laboratory of Agricultural Environment and Agricultural Products Safety, Guangxi University, Nanning 530005, China; 4. College of Plant Science and Technology of Huazhong Agricultural University, Wuhan 430070, China
Key Words:Thrips hawaiiensis, spinetoram, insecticide resistance, risk assessment
Abstract:

 [Objectives]  To assess the risk of spinetoram resistance in Thrips hawaiiensis and provide a theoretical basis for the rational application of insecticides to control these pests. [Methods]  The thrips insecticide bioassay system (TIBS) was used to bioassay different insecticides. A resistant population of thrips was established by group selection, and realized heritability (h2) and resistance development rates were estimated using the threshold trait analysis method. [Results]  The T. hawaiiensis strain developed 19.42-fold resistance to spinetoram after 17 generations of selection over 20 generations. The average h2 of this strain was estimated as 0.1317. According to the pattern of spinetoram resistance development in T. hawaiiensis, h2 values in four stages of resistance development were 0.1960 (G1-G3), 0.1796 (G5-G9), 0.1262 (G11-G14) and 0.0944 (G16-G20), respectively. Based on the average h2 of 0.1317, it was predicted that T. hawaiiensis would need 16.68, 13.7011.219.527.552.55 generations to develop 10-fold resistance to spinetoram under selection pressures (mortality) of 50%, 60%, 70%, 80%, 90% and 99%, respectively. [Conclusion]  These findings indicate that T. hawaiiensis is capable of developing resistance to spinetoram, and that this insecticide should therefore be used rationally in the field.

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