Authors: SPOLLENI, KEVIN; HOY, MARJORIE A.

Source: Journal of Economic Entomology, Volume 86, Number 2, April 1993 , pp. 195-204(10)

Publisher: Entomological Society of America

Abstract:

Leaf-residue and plastic cup bioassays were done with a carbaryl-resistant (R) and two susceptible (S) (Base and La Couague) colonies of Aphytis melinus DeBach. Tolerances to carbaryl, methidathion, chlorpyrifos, dimethoate, and formetanate were compared among the two 5 colonies and the laboratory-selected R strain. Two-leaf bioassays done during 1989 indicated that the R strain survived Significantly better than the Base colony on both carbaryl- and chlorpyrifos-treated leaves. The R strain survived better than both 5 colonies on all pesticides tested with a single concentration in the cup bioassay. Results of bioassays done during 1990connfirmed that the R strain survived better than the La Couague colony on carbaryl, methidathion, dimethoate, and formetanate leaf residues. In the 1990 leaf residue tests, chlorpyrifos residues were more toxic to the R strain. Practical aspects of releasing the R strain in California citrus orchards are discussed.

Document Type: Research article

Publication date: 1993-04-01

More about this publication?

• 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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