Geographical and Temporal Variation in Response to Insecticides in Various Life Stages of Aphis gossypii (Homoptera: Aphididae) Infesting Cotton in California
Author: GRAFTON-CARDWELL, ELIZABETH E.
Source: Journal of Economic Entomology, Volume 84, Number 3, June 1991 , pp. 741-749(9)
Publisher: Entomological Society of America
Abstract:Five California populations of cotton aphid, Aphts gossypit Glover, ere tested for variability in their responses to the organophosphorus insecticides oxydemeton-methyl, chlorpyrifos, and dicrotophos; the pyrethroid biphenate; and the chlorinated hydrocarbon endosulfan. In the dipped-leaf contact bioassay, alatiform nymphs were significantly more tolerant to all five insecticides compared with apterous adults. A subsequent geographical survey for resistance with single discriminating concentrations revealed that 6 of 13 earlyseasonA gOSSypii populations had significantly greater survival when"exposedto one or more of the organophosphates or endosulfan than the other populations. These populations were collected primarily from the eastern range of the major cotton-growing region of California A survey of aphid response to pesticides over time showed that survival declined in some of the populations as the season progressed. Populations that had significant survival at the discriminating concentrations as adults also showed improved survival of offspring exposed to residues.
Document Type: Research Article
Publication date: 1991-06-01
- Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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