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Cuticular penetration of beta-cypermethrin in insecticide-susceptible and resistant strains of Bactrocera dorsalis

文献类型： 外文期刊

作者： Lin, Yuying 1 ; Jin, Tao 1 ; Zeng, Ling 1 ; Lu, Yongyue 1 ;

作者机构： 1.S China Agr Univ, Dept Entomol, Guangzhou 510640, Guangdong, Peoples R China

2.Chinese Acad Trop Agr Sci, Key Lab Monitoring & Control Trop Agr & Forest In, Minist Agr, Environm & Plant Protect Inst, Danzhou 571737, Peoples R China

关键词： Bactrocera dorsalis Hendel;Insecticide resistance;Cuticle thickness;Integument structure;Fat body;Cuticular penetration

期刊名称：PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY （ 影响因子：3.963； 五年影响因子：4.454 ）

ISSN： 0048-3575

年卷期： 2012 年 103 卷 3 期

页码：

收录情况： SCI

摘要： Semi-thin sectioning and transmission electron microscope techniques were employed to investigate the cuticle thickness, integument structure, and fat body of larvae from susceptible and resistant strains of Bactrocera dorsalis. The results showed that the cuticle of beta-cypermethrin-resistant strains (25.96 +/- 1.00 mu m) was thicker than that of susceptible strains (19.36 +/- 0.82 mu m). The number of chitin layers in the endocuticle of beta-cypermethrin-resistant strains (98.00 +/- 3.61 layers) was more than that in susceptible strains (75.67 +/- 2.40 layers). Compared with susceptible strains, the laminated structure of the chitin layers in the endocuticle of resistant strains revealed higher density and more distinctive structure, and the interspace of epidermal cells was thicker. Fat body in the resistant insects contained more fat granules than those in susceptible insects. Moreover, HPLC analysis showed that the cuticular penetration of beta-cypermethrin into larvae of resistant strains was slower than that of susceptible strains. In addition, the metabolism of beta-cypermethrin in resistant strains was faster than that in susceptible strains, indicating that the resistant strains could enhance detoxification metabolism. These results indicated that cuticle thickness, fat body, laminated structure of the chitin layers, and interspace of epidermal cells might be correlated with cuticular penetration between susceptible and resistant strains, suggesting that the resistant strains could decrease the rate of penetration of insecticide into the internal cavity. Crown Copyright (C) 2012 Published by Elsevier Inc. All rights reserved.

  • 相关文献

[1]Characteristics of protein variants in trichlorphon-resistant Bactrocera dorsalis (Diptera; Tephritidae) larvae. Jin, T.,Zeng, L.,Lin, Y. -Y.,Lu, Y. -Y.,Liang, G. -W.,Jin, T.,Lin, Y. -Y.. 2012

[2]Monitoring of Bactrocera dorsalis (Diptera: Tephritidae) Resistance to Cyantraniliprole in the South of China. Zhang, Ruimin,Chen, Jiahua,He, Shiyu.

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