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Fipronil resistance in the whitebacked planthopper ( Sogatella furcifera ): possible resistance mechanisms and cross‐resistance
Author(s) -
Tang Jian,
Li Jian,
Shao Ying,
Yang Baojun,
Liu Zewen
Publication year - 2010
Publication title -
pest management science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.296
H-Index - 125
eISSN - 1526-4998
pISSN - 1526-498X
DOI - 10.1002/ps.1836
Subject(s) - fipronil , planthopper , cross resistance , imidacloprid , biology , resistance (ecology) , delphacidae , toxicology , botany , agronomy , homoptera , pest analysis , pesticide , genetics , hemiptera
BACKGROUND: The whitebacked planthopper (WBPH), Sogatella furcifera (Horváth), is a major rice pest in many parts of Asia. Fipronil has been widely used to control rice pests, and resistance to fipronil has been reported in some important species. RESULTS: A field population (F) of WBPH was collected, with 50.5‐fold resistance to fipronil, which increased to 137.5‐fold (F‐se) after continuous selection for 11 generations. The F‐se population did not show significant cross‐resistance to the insecticides examined by comparison with the F population. TPP (synergism ratio 1.9), DEM (1.5) and PBO (1.1) showed only slight synergism on fipronil in the F‐se population. A large increase was found in esterase and P450 monooxygenase activity in the F‐se population. In vitro , PBO inhibited both esterase and P450 monooxygenase activity, and TPP inhibited esterase activity in the F‐se population. CONCLUSION: Synergistic study in vivo and biochemical study in vitro indicated that esterase and P450 monooxygenases might be important factors for fipronil resistance in the selected population F‐se. However, these biochemical factors could not lead to such high resistance (137.5‐fold) in the F‐se population, and target‐site insensitivity would be another or more important factor. Copyright © 2009 Society of Chemical Industry