Sublethal Effects of Thiamethoxam on Biological Traits and Detoxification Enzyme Activities in the Small Brown Planthopper, Laodelphax striatellus (Fallen)
文献类型： 外文期刊
作者： Cai, Yubiao 1 ; Dou, Tao 1 ; Gao, Futao 1 ; Wang, Guanghua 2 ; Dong, Yachang 2 ; Song, Nan 1 ; An, Shiheng 1 ; Yin, Xinming 1 ; Liu, Xiangyang 1 ; Ren, Yingdang 2 ;
作者机构： 1.Henan Agr Univ, Coll Plant Protect, Zhengzhou 450002, Henan, Peoples R China
2.Henan Acad Agr Sci, Inst Plant Protect, Zhengzhou 450002, Henan, Peoples R China
关键词： Laodelphax striatellus; Thiamethoxam; sublethal effect; age-stage life table; detoxification enzyme
期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.447； 五年影响因子：2.483 ）
ISSN： 0022-0493
年卷期：
页码：
收录情况： SCI
摘要： The small brown planthopper (Laodelphax striatellus (Fallen), Hemiptera: Delphacidae), is an important agricultural pest of rice, and neonicotinoid insecticides are commonly used for controlling L. striatellus. However, the sublethal effects of thiamethoxam on L. striatellus remain relatively unknown. In this study, an age-stage life table procedure was used to evaluate the sublethal effects of thiamethoxam on the biological parameters of L. striatellus. Additionally, activities of carboxylesterase, glutathione S-transferase, and cytochrome P450 monooxygenase in the third instar nymphs were analyzed. The results indicated that the survival time of F-0 adults and the fecundity of female adults decreased significantly after the third instar nymphs were treated with sublethal concentrations of thiamethoxam (LC15 0.428 mg/liter and LC30 0.820 mg/liter). The developmental duration, adult preoviposition period, total preoviposition period, and mean generation time of the F-1 generation increased significantly, whereas the fecundity of the female adults, intrinsic rate of increase (r(i)), and finite rate of increase (lambda) decreased significantly. The oviposition period was significantly shorter for the insects treated with LC30 than for the control insects. Neither sublethal concentrations had significant effects on the adult longevity, net reproduction rate (R-0), or gross reproduction rate (GRR) of the F-1 generation. The activities of carboxylesterase, glutathione-S-transferase, and cytochrome P450 monooxygenase increased significantly after the thiamethoxam treatments. These results indicate that sublethal concentrations of thiamethoxam can inhibit L. striatellus population growth and enhance detoxification enzyme activities.
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