Mutations in the sodium channel associated with pyrethroid resistance in the greenhouse whitefly, Trialeurodes vaporariorum
Williamson, Martin S.
BACKGROUND: Trialeurodes vaporariorum Westwood is an important pest of protected crops in temperate regions of the world. Resistance to pyrethroid insecticides is long established in this species, but the molecular basis of the mechanism(s) responsible has not previously been disclosed. RESULTS: Mortality rates of three European strains of T. vaporariorum to the pyrethroid bifenthrin were calculated, and each possessed significant resistance (up to 662-fold) when compared with a susceptible reference strain. Direct sequencing revealed three amino acid substitutions in the para-type voltage-gated sodium channel (the pyrethroid and DDT target site) of bifenthrin-resistant T. vaporariorum at positions previously implicated with pyrethroid or DDT resistance (M918L, L925I and T929I) in other related species. CONCLUSION: This study indicates that resistance to bifenthrin in T. vaporariorum is associated with target-site insensitivity, and that the specific mutations in the sodium channel causing resistance may differ between localities. Copyright (C) 2012 Society of Chemical Industry
Published inPest Management Science
RelationsSchool of Life and Medical Sciences
MetadataShow full item record
Showing items related by title, author, creator and subject.
Combining R gene and quantitative resistance increases effectiveness of cultivar resistance against Leptosphaeria maculans in Brassica napus in different environments : Combining R gene and quantitative resistance against Leptosphaeria maculans Huang, Yongju; Mitrousia, Georgia; Mohamed Sidique, Siti; Qi, Aiming; Fitt, Bruce (2018-05-23)Using cultivar resistance against pathogens is one of the most economical and environmentally friendly methods for control of crop diseases. However, cultivar resistance can be easily rendered ineffective due to changes ...
Thompson, G D; Matten, S; Denholm, Ian; Whalon, M E; Leonard, P (CABI Wallingford, 2008)
Understanding interactions between quantitative resistance and qualitative resistance for sustainable management of Phoma stem canker (Leptosphaeria maculans ) in oilseed rape (Brassica napus) Huang, Yongju; Mitrousia, Georgia; Fitt, Bruce D.L. (2013-08)Effective control of phoma stem canker (Leptosphaeria maculans) relies on use of host resistance. Two types of resistance to L. maculans have been identified; major resistance (R) gene-mediated qualitative resistance and ...