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Current status of insecticide resistance in Q biotype Bemisia tabaci populations from Crete

Roditakis, E., Grispou, M., Morou, Evangelia, Kristoffersen, J. B., Roditakis, N., Nauen, R., Vontas, John and Tsagkarakou, A. (2009) 'Current status of insecticide resistance in Q biotype Bemisia tabaci populations from Crete'. Pest Management Science, Vol 65, Issue 3, pp. 313-322.

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BACKGROUND: A major problem of crop protection in Crete, Greece, is the control of Bemisia taboci (Gennadius) (Homoptera: Aleyrodidae) with chemical Insecticides owing to the rapid development of resistance. The aim of this study was to Investigate the establishment of resistance and the underlying mechanisms to major insecticide classes with classical bioassays and known biochemical resistance markers.
RESULTS: During a 2005-2007 survey, 53 Q biotype populations were collected. Application history records showed extensive use of neonicotinoids, organophosphates, carbamates and pyrethroids. High resistance levels were identified in the majority of populations (>80%) for imidacloprid (RF: 38-1958x) and alpha-cypermethrin (RF: 30-600x). Low resistance levels (RF < 12) were observed for pirimiphos-methyl. A strong correlation between resistance to imidacloprid and the number of applications with neonicotinoids was observed. Significant correlations were observed between COE and P450-dependent monoxygenase activity with resistance to alpha-cypermethrin and imidacloprid respectively. A propoxur-based AChE diagnostic test indicated that IAChE was widespread in most populations. Resistance levels for alpha-cypermethrin were increased when compared with a previous survey (2002-2003). Differentiation of LC50 values between localities was observed for imidacloprid only.
CONCLUSION: Bemisia tabaci resistance evolved differently in each of the three insecticides studied. Imidacloprid resistance seems less established and less persistent than alpha-cypermethrin resistance. The low resistance levels for pirimiphos-methyl suggest absence of cross-resistance with other organophosphates or carbamates used. (C) 2008 Society of Chemical Industry

Item Type: Article
Additional Information: 413FC Times Cited:0 Cited References Count:44
Uncontrolled Keywords: insecticide resistance bemisia tabaci q biotype imidacloprid alpha-cypermethrin pirimiphos methyl crete organophosphate resistance aleyrodidae populations pyrethroid resistance whitefly homoptera esterase-activity b-biotype hemiptera pests cotton neonicotinoids
Subjects: WA Public Health > WA 20.5 Research (General)
QX Parasitology > Insects. Other Parasites > QX 650 Insect vectors
WB Practice of Medicine > Medical Climatology > WB 710 Diseases of geographic areas
QX Parasitology > QX 4 General works
WA Public Health > WA 100 General works
QW Microbiology and Immunology > QW 4 General works. Classify here works on microbiology as a whole.
QX Parasitology > Insects. Other Parasites > QX 600 Insect control. Tick control
QX Parasitology > QX 45 Host-parasite relations
QW Microbiology and Immunology > QW 45 Microbial drug resistance. General or not elsewhere classified.
Faculty: Department: Groups (2002 - 2012) > Vector Group
Digital Object Identifer (DOI):
Depositing User: Users 183 not found.
Date Deposited: 26 Apr 2010 10:36
Last Modified: 06 Feb 2018 12:59


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