- UHRA Home
- University of Hertfordshire
- Browsing University of Hertfordshire by Author
Browsing University of Hertfordshire by Author "Gorman, Kevin"
Now showing items 1-17 of 17
-
Age-specific expression of a P450 monooxygenase (CYP6CM1) correlates with neonicotinoid resistance in Bemisia tabaci
Jones, Christopher M.; Daniels, Miriam; Andrews, Melanie; Slater, Russell; Lind, Robert J.; Gorman, Kevin; Williamson, Martin S.; Denholm, Ian (2011-11)The whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae), is an invasive insect pest of agriculture and horticulture worldwide. The neonicotinoid insecticides, which target nicotinic acetylcholine receptors in post-synaptic ... -
Age-specific expression of resistance to a neonicotinoid insecticide in the whitefly Bemisia tabaci
Nauen, Ralf; Bielza, Pablo; Denholm, Ian; Gorman, Kevin (2008-09-29)Neonicotinoid insecticides retain a crucial role within many chemical and integrated control strategies for the tobacco whitefly, Bemisia tabaci Gennadius, in spite of the establishment of potent and widespread resistance ... -
Characterisation of Neonicotinoid and Pymetrozine Resistance in Strains of Bemisia tabaci (Hemiptera: Aleyrodidae) from China
Rao, Qiong; Xu, Yong-hua; Luo, Chen; Zhang, Hong-yu; Jones, Christopher M.; Devine, Greg J.; Gorman, Kevin; Denholm, Ian (2012-02)Four strains of the Q biotype and one of the B biotype of the whitefly Bemisia tabaci collected from China were characterised for resistance to four neonicotinoid insecticides and pymetrozine. Q biotype strains showed ... -
Cross-resistance relationships between neonicotinoids and pymetrozine in Bemisia tabaci (Hemiptera: Aleyrodidae)
Gorman, Kevin; Slater, Russell; Blande, James D.; Clarke, Alison; Wren, Jodie; McCaffery, Alan; Denholm, Ian (2010-11)BACKGROUND: Although cross-resistance between compounds in the same insecticide group is a frequently observed phenomenon, cross-resistance between groups that differ in structural and functional characteristics can be ... -
Cross-resistance relationships of the sulfoximine insecticide sulfoxaflor with neonicotinoids and other insecticides in the whiteflies Bemisia tabaci and Trialerurodes vaporariorum
Longhurst, C.; Babcock, Jonathan M.; Denholm, Ian; Gorman, Kevin; Thomas, James D.; Sparks, Thomas C. (2013-07)Insecticides are important tools for managing damaging insect pests. Compounds that are effective against pests such as the whiteflies Bemisia tabaci and Trialeurodes vaporariorum, which show resistance to a range of ... -
Discovery and Characterization of Sulfoxaflor, a Novel Insecticide Targeting Sap-Feeding Pests
Zhu, Yuanming; Loso, Michael R.; Watson, Gerald B.; Sparks, Thomas C.; Rogers, Richard B.; Huang, Jim X.; Gerwick, B. Clifford; Babcock, Jonathan M.; Kelley, Donald; Hegde, Vidyadhar B.; Nugent, Benjamin M.; Renga, James M.; Denholm, Ian; Gorman, Kevin; DeBoer, Gerrit J.; Hasler, James; Meade, Thomas; Thomas, James D. (2011-04-13)The discovery of sulfoxaflor [N-[methyloxido[1-[6-(trifluoromethyl)-3-pyridinyl]ethyl]-lambda(4)-sulfanylidene] cyanamide] resulted from an investigation of the sulfoximine functional group as a novel bioactive scaffold ... -
English field samples of Thrips tabaci show strong and ubiquitous resistance to deltamethrin
Foster, Stephen P.; Gorman, Kevin; Denholm, Ian (2010-08)BACKGROUND: Onion thrips, Thrips tabaci Lindeman, is a prevalent pest of glasshouse and field vegetables, such as leeks and salad onions. Pesticides are the main option for control, but this approach risks the evolution ... -
High-throughput allelic discrimination of B and Q biotypes of the whitefly, Bemisia tabaci, using TaqMan allele-selective PCR
Jones, Christopher M.; Gorman, Kevin; Denholm, Ian; Williamson, Martin S. (2008-01)BACKGROUND: B and Q biotypes of the whitefly, Bemisia tabaci (Gennadius), are generally regarded as the most significant given their global distribution and strong resistance to insecticides. Since these biotypes can coexist ... -
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 ... -
Insecticide resistance in Bemisia tabaci : A global perspective
Denholm, Ian; Gorman, Kevin; Williamson, Martin (2008-01-10)Current management strategies for Bemisia tabaci are severely constrained by the propensity of these species to develop resistance to insecticides. The breadth and geographical extent and breadth of resistance continue to ... -
Insecticide resistance in Bemisia tabaci biotype Q (Hemiptera: Aleyrodidae) from China
Luo, C.; Jones, C. M.; Devine, G.; Zhang, F.; Denholm, Ian; Gorman, Kevin (2010-05)Dispersion of invasive biotypes of the tobacco whitefly, Bemisia tabaci, has led to protracted crop protection constraints in numerous countries over recent decades. These polyphagous, highly efficient vectors of plant ... -
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 ... -
Neonicotinoid resistance in rice brown planthopper, Nilaparvata lugens
Gorman, Kevin; Liu, Zewen; Denholm, Ian; Brueggen, Kai-Uwe; Nauen, Ralf (2008-11)BACKGROUND: Rice brown planthopper, Nilaparvata lugens Stal, is a primary insect pest of cultivated rice, and effective control is essential for economical crop production. Resistance to neonicotinoid insecticides, in ... -
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 ... -
Over-expression of cytochrome P450 CYP6CM1 is associated with high resistance to imidacloprid in the B and Q biotypes of Bemisia tabaci (Hemiptera : Aleyrodidae)
Karunker, Iris; Benting, Juergen; Lueke, Bettina; Ponge, Tanja; Nauen, Ralf; Roditakis, Emmanouil; Vontas, John; Gorman, Kevin; Denholm, Ian; Morin, Shai (2008-06)The two most damaging biotypes of Bemisia tabaci, B and Q, have both evolved strong resistance to the neonicotinoid insecticide imidacloprid. The major mechanism in all samples investigated so far appeared to be enhanced ... -
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 ...