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Browsing University of Hertfordshire by Author "Karatolos, Nikos"
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Incidence and characterisation of resistance to neonicotinoid insecticides and pymetrozine in the greenhouse whitefly, Trialeurodes vaporariorum Westwood (Hemiptera: Aleyrodidae)
Karatolos, Nikos; Denholm, Ian; Williamson, Martin; Nauen, Ralf; Gorman, Kevin (2010-12)BACKGROUND: Trialeurodes vaporariorum (Westwood), also known as the greenhouse whitefly, is a serious pest of protected vegetable and ornamental crops inmost temperate regions of the world. Neonicotinoid insecticides are ... -
Mutations in the sodium channel associated with pyrethroid resistance in the greenhouse whitefly, Trialeurodes vaporariorum
Karatolos, Nikos; Gorman, Kevin; Williamson, Martin S.; Denholm, Ian (2012-06)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 ... -
Over-Expression of a Cytochrome P450 Is Associated with Resistance to Pyriproxyfen in the Greenhouse Whitefly Trialeurodes vaporariorum
Karatolos, Nikos; Williamson, Martin S.; Denholm, Ian; Gorman, Kevin; Ffrench-Constant, Richard H.; Bass, Chris (2012-02-08)Background: The juvenile hormone mimic, pyriproxyfen is a suppressor of insect embryogenesis and development, and is effective at controlling pests such as the greenhouse whitefly Trialeurodes vaporariorum (Westwood) which ... -
Pyrosequencing the transcriptome of the greenhouse whitefly, Trialeurodes vaporariorum reveals multiple transcripts encoding insecticide targets and detoxifying enzymes
Karatolos, Nikos; Pauchet, Yannick; Wilkinson, Paul; Chauhan, Ritika; Denholm, Ian; Gorman, Kevin; Nelson, David R.; Bass, Chris; Ffrench-Constant, Richard H.; Williamson, Martin S. (2011-01-24)Background: The whitefly Trialeurodes vaporariorum is an economically important crop pest in temperate regions that has developed resistance to most classes of insecticides. However, the molecular mechanisms underlying ... -
Resistance to spiromesifen in Trialeurodes vaporariorum is associated with a single amino acid replacement in its target enzyme acetyl-coenzyme A carboxylase
Karatolos, Nikos; Williamson, M. S.; Denholm, Ian; Gorman, Kevin; Ffrench-Constant, R.; Nauen, Ralf (2012-06)Spiromesifen is a novel insecticide and is classed as a tetronic acid derivative. It targets the insects' acetyl-coenzyme A carboxylase (ACCase) enzyme, causing a reduction in lipid biosynthesis. At the time of this ...