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Titre :
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Resistance of Aphis gossypii (Homoptera, Aphididae) to Insecticides in Hawaii - Spatial Patterns and Relation to Insecticide Use
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Auteurs :
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R. Hollingsworth ;
B. Tabashnik ;
D. Ullman ;
M. Johnson ;
R. Messing
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Type de document :
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article/chapitre/communication
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Année de publication :
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1994
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Format :
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293-300
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Langues:
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= Anglais
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Mots-clés:
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Aphis-Gossypii
;
Insecticide Resistance
;
Cucurbit Crops
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Résumé :
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For 16 populations of the cotton aphid, Aphis gossypii Glover, from Hawaii, comparisons of LC50 s showed up to 3.6-fold resistance to endosulfan (an organochlorine), 390-fold resistance to esfenvalerate (a pyrethroid), 9.2-fold resistance to methomyl (a carbamate), and >2,000-fold resistance to oxydemeton-methyl (an organophosphate). Analysis of variance showed significant intra-island variation in susceptibility to each insecticide. Variation among islands was significant only for endosulfan. Total numbers of annual insecticide sprays per site ranged from 0 to 102. LC50 s for endosulfan were positively correlated with the previous use of endosulfan; LC50 s for oxydemeton-methyl were positively correlated with the previous use of organophosphates. Results suggest that variation in insecticide susceptibility was caused by local variations in insecticide use.
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Source :
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Journal of Economic Entomology - 0022-0493, vol. 87, n° 2
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