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Regional reversion of insecticide resistance in Helicoverpa armigera (Lepidoptera: Noctuidae) is associated with the use of Bt cotton in northern China
Author(s) -
Wu Kongming,
Mu Wei,
Liang Gemei,
Guo Yuyuan
Publication year - 2005
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.999
Subject(s) - helicoverpa armigera , endosulfan , noctuidae , pest analysis , biology , toxicology , lepidoptera genitalia , bt cotton , cyhalothrin , agronomy , microbiology and biotechnology , pesticide , botany
A continuous programme for monitoring resistance of Helicoverpa armigera (Hübner) to commonly used insecticides was undertaken for assessing the impact of Bt cotton planting on the evolution of the pest resistance from 1994 to 2002 in China. The bioassay results showed that the resistance levels per year in field populations of H armigera to lambda‐cyhalothrin, phoxim and endosulfan decreased, respectively, to 9–15‐fold, 11–14‐fold and 6–8‐fold in 2001–2002 from 197–262‐fold, 52–74‐fold and 18–38‐fold before the cultivation of Bt cotton in 1997. This significant increase in susceptibility to insecticides is expected to result in a reduction in insecticide application for H armigera control in Bt cotton. It is concluded that Bt cotton is playing an important role in the long‐term management of H armigera by increasing the potential for natural and chemical control of the pest. Copyright © 2005 Society of Chemical Industry