Extent of Resistance to Organophosphorus Insecticides in Field Populations of the Green Peach Aphid (Homoptera: Aphididae) Infesting Flue-Cured Tobacco in Virginia1
- 1 February 1984
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 77 (1) , 1-3
- https://doi.org/10.1093/jee/77.1.1
Abstract
Field strains of Myzus persicae (Sulzer), collected from flue-cured tobacco fields throughout south-central Virginia, were tested for resistance to acephate, disulfoton, malathion, microencapsulated methyl parathion, and monocrotophos. Aphids were exposed to residues of the insecticides on the upper leaf surfaces of potted tobacco plants. Concentration regressions showed that acephate resistance was present in field-collected strains but was not widespread. Of five field strains tested, one was ca. 6- and 13-fold more resistant to acephate than a laboratory (reference standard) strain at the LC50 and LC90 levels, respectively. Four strains exhibited slightly greater inherent tolerance to acephate than the reference. None of the field strains tested were resistant to disulfoton, malathion, methyl parathion, and monocrotophos.Keywords
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