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Insecticide resistance in the tropical bedbug Cimex hemipterus

Karunaratne, S. H. P. P., Damayanthi, B. T., Fareena, M. H. J., Imbuldeniya, V. and Hemingway, Janet ORCID: (2007) 'Insecticide resistance in the tropical bedbug Cimex hemipterus'. Pesticide Biochemistry and Physiology, Vol 88, Issue 1, pp. 102-107.

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Insecticide resistance in the bedbug Cimex hemipterus was investigated using 4211 bedbugs collected from three districts of Sri Lanka. Insecticide bioassays were carried out with discriminating dosages of deltamethrin, permethrin, DDT, malathion, and propoxur. Activity levels of insecticide metabolizing enzymes and the insecticide target site acetylcholinesterase were monitored using biochemical assays. Percentage survivals after DDT, malathion, and propoxur exposure were 41-88%, 18-64%, and 11-41%, respectively. For deltamethrin and permethrin, KT50/KT90 (time to knock-down 50%/90% of the population) values were 0.5-24/1.0-58 and 1.3-10/2.5-47 h, respectively. Both elevated esterase and malathion carboxylesterase mechanisms were present in bedbug populations. Monooxygenase levels were heterogeneous. Organophosphate and carbamate target site acetylcholinesterase, was insensitive in 29-44% of the populations. High DDT resistance was probably due to glutathione S-transferases. Malathion carboxylesterases are mainly responsible for high malathion resistance. High tolerance to both DDT and pyrethroids suggests the presence of 'kdr' type resistance mechanism in one population. (c) 2006 Elsevier Inc. All rights reserved.

Item Type: Article
Uncontrolled Keywords: bedbugs cimex hemipterus insecticide resistance glutathione s-transferases culex-quinquefasciatus pyrethroid resistance south-africa lectularius mosquitos anopheles mechanism tanzania vectors
Subjects: QX Parasitology > Insects. Other Parasites > QX 503 Hemiptera (e.g., Bedbugs)
QX Parasitology > Insects. Other Parasites > QX 600 Insect control. Tick control
Faculty: Department: Groups (2002 - 2012) > Vector Group
Digital Object Identifer (DOI):
Depositing User: Ms Julia Martin
Date Deposited: 06 Sep 2010 15:20
Last Modified: 06 Feb 2018 13:01


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