- UHRA Home
- Browsing by Author
Browsing by Author "Denholm, Ian"
Now showing items 1-20 of 72
-
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 ... -
Amplification of a Cytochrome P450 Gene Is Associated with Resistance to Neonicotinoid Insecticides in the Aphid Myzus persicae
Puinean, Alin M.; Foster, Stephen P.; Oliphant, Linda; Denholm, Ian; Field, Linda M.; Millar, Neil S.; Williamson, Martin S.; Bass, Chris (2010-06)The aphid Myzus persicae is a globally significant crop pest that has evolved high levels of resistance to almost all classes of insecticide. To date, the neonicotinoids, an economically important class of insecticides ... -
Analyzing haplodiploid inheritance of insecticide resistance in whitefly biotypes
Crowder, D. W.; Horowitz, A. R.; Tabashnik, B. E.; Dennehy, T. J.; Denholm, Ian; Gorman, K.; Carriere, Y. (2009-06)We developed new methods for analyzing inheritance of insecticide resistance in haplocliploid arthropods and applied them to elucidate resistance of the whitefly Bemisia tabaci (Gennadius) to an insect growth regulator, ... -
Biological Evaluation of spiromesifen against Bemisia tabaci and an assessment of resistance risks
Guthrie, F; Denholm, Ian; Devine, GJ; Nauen, R (British Crop Protection Council (BCPC), 2003-11-10) -
Characterisation of imidacloprid resistance mechanisms in the brown planthopper, Nilaparvata lugens Stal (Hemiptera: Delphacidae)
Puinean, Alin M.; Denholm, Ian; Millar, Neil S.; Nauen, Ralf; Williamson, Martin S. (2010-06)Effective control of the brown planthopper, Nilaparvata lugens Stal, across rice-growing regions of Asia has been seriously compromised over the last 2 years by the appearance of widespread resistance to the neonicotinoid ... -
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 ... -
Characterisation of neonicotinoid resistance in Bemisia tabaci from Spain
Gorman, K; Wren, J; Devine, G; Denholm, Ian (British Crop Protection Council (BCPC), 2003) -
Chlorpyrifos ethyl-oxon sensitive and insensitive acetylcholinesterase variants of greenhouse whitefly, Trialeurodes vaporariorum (Westw.) (Hemiptera: Aleyrodidae) from Turkey
Erdogan, Cem; Velioglu, A. S.; Gurkan, M. Oktay; Denholm, Ian; Moores, Graham D. (2012-11)Resistance to the organophosphate chlorpyrifos ethyl was investigated in greenhouse populations of Trialeurodes vaporariorum from Turkey using both bioassay and biochemical studies. These populations were collected from ... -
A comparison of methodologies for the staining and quantification of intracellular components of Arbuscular Mychorrizal (AM) fungi in the root cortex of two varieties of winter wheat
Wilkes, Thomas; Warner, Douglas; Edmonds-Brown, Veronica; Davies, Keith; Denholm, Ian (2019-11-21)Arbuscular Mychorrizal (AM) fungi are one of the most common fungal organisms to exist in symbiosis with terrestrial plants facilitating the growth and maintenance of arable crops. Wheat has been studied extensively for ... -
Composition and characteristics of a transitional flora at Rough Hills grasslands, Bayfordbury
Mashanova, Alla; Scholes, Bronwyn; Denholm, Ian (2021-10-01) -
Conservation biological control at the landscape level: measuring and modelling
Petit, S.; Lavigne, C; Ferguson, A; Tixier, P; Bohan, D; Otto, S.; Alomar, O; Vers, A; Bocci, G; Eggenschwiter, L; Moonen, C; Golla, B; Denholm, Ian (IOBC/WPRS, 2010)The incorporation of landscape management into Conservation Biological Control (CBC) strategies is a priority area of research but is hindered by a lack of harmonisation of the means to describe and measure the effectiveness ... -
Correlated responses to neonicotinoid insecticides in clones of the peach-potato aphid, Myzus persicae (Hemiptera: Aphididae)
Foster, Stephen P.; Cox, Diana; Oliphant, Linda; Mitchinson, Samantha; Denholm, Ian (2008-11)BACKGROUND: Although there are still no confirmed reports of strong resistance to neonicotinoid. insecticides in aphids, the peach-potato aphid (Myzus persicae Sulzer) shows variation in response, with some clones exhibiting ... -
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 ... -
Ecological determinants of Bemisia tabaci resistance to insecticides
Castle, S J; Palumbo, J C; Prabhakar, N; Horowitz, A. R.; Denholm, Ian (Springer Nature, 2010) -
The effect of dose rate of imidacloprid and clothianidin on insecticide-resistantclones of Myzus persicae (Sulzer)
Haylock, L A; Dewar, A M; Garner, B H; Sands, R J N; Baker, P; Foster, S P; Cox, D; Mason, N; Denholm, Ian (2002-11-18) -
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 ... -
The evolution of insecticide resistance in the peach-potato aphid, Myzus persicae
Bass, Chris; Puinean, Alin M.; Zimmer, C T; Denholm, Ian; Field, LM; Foster, SP; Gutbrod, O; Nauen, Ralf; Slater, R; Williamson, MS (2014-08-31)The peach potato aphid, Myzus persicae is a globally distributed crop pest with a host range of over 400 species including many economically important crop plants. The intensive use of insecticides to control this species ...