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filariose

International Journal of Tropical Insect Science (1)

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Resistance to Malathion in Culex quinquefasciatus Say (Diptera: Culicidae) from Madurai, South India
S. Poopathi, N. Arunachalam, N. Gopalan, G. Baskaran, T. R. Mani
Journal:

Insect Science and Its Application / Volume 21 / Issue 3 / September 2001

Published online by Cambridge University Press:

19 September 2011, pp. 251-255

Print publication:

September 2001
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—Organophosphorus-derived pesticides are commonly used to control Culex quinquefasciatus, the principal vector of filariasis in India. This paper reports on the susceptibility of C. quinquefasciatus from Madurai city, Tamil Nadu and its environs, to the organophosphate Malathion. It was observed that both larval and adult mosquitoes had low levels of resistance to the pesticide, with resistance ratios at LC50, LC90, and LC95 varying from 0.94 to 3.07 in larvae, and 0.93 to 34.68 in adults. This observation indicates the possibility of higher resistance developing in C. quinquefasciatus populations, the limitation of organophosphorus compounds as larvicides in mosquito breeding sites as a measure to control filariasis, and the importance of research into alternative measures for managing C. quinquefasciatus.