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1 June 2003 High Resistance of Field Populations of the Cotton Aphid Aphis gossypii Glover (Homoptera: Aphididae) to Pyrethroid Insecticides in Pakistan
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Abstract

Samples of the cotton aphid, Aphis gossypii Glover, populations collected from the vicinity of Multan in central Pakistan from 1997 to 2000 were evaluated for pyrethroid resistance in comparison with a susceptible laboratory colony using a leaf-dip bioassay. Resistance to seven pyrethroid insecticides viz. cypermethrin, alphacypermethrin, zetacypermethrin, cyfluthrin, fenpropathrin, bifenthrin, and lambdacyhalothrin was generally very high. However, A. gossypii consistently showed lower resistance to deltamethrin than to other pyrethroids. The lower deltamethrin resistance implies that deltamethrin might be less affected by the resistance mechanism(s) present, a feature that could potentially be exploited in strategies for managing A. gossypii. The influence of insecticide use on cotton on the extent and dynamics of resistance in A. gossypii is discussed.

Mushtaq Amad, M. Iqbal Arif, and Ian Denholm "High Resistance of Field Populations of the Cotton Aphid Aphis gossypii Glover (Homoptera: Aphididae) to Pyrethroid Insecticides in Pakistan," Journal of Economic Entomology 96(3), 875-878, (1 June 2003). https://doi.org/10.1603/0022-0493-96.3.875
Received: 2 April 2002; Accepted: 1 June 2002; Published: 1 June 2003
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