European Red Mite and Two-Spotted Spider Mite Control on Apples in California1

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Field tests were conducted on 'Red Delicious' apples during the summers of 1966 and 1967 to evaluate several spray chemicals for control of the European red mite. Panonychus ulmi (Koch). The 1967 treatments were also evaluated for control of the two-spotted spider mite, Tetranychus llrticae Koch. MorestanĀ® (6-methyl- 2,3-quinoxalineclithiol cyclic S,S-dithiocarbonate) gave long-lasting control of P. ulmi. Dicofol, EP-333 (N'- (4- chloro-o-tolyl) -N,N-dimethylformamidine hydrochloride), LovozalĀ® (phenyl 5,6-dichloro-2- (trifIuoromethyl) -I-benzi- Midazolecarboxylate), GS-19851 (isopropyl 4,4'-dibromobenzilate) AzodrinĀ® (3-hydroxy-N-methy1-cis-crotonamide dimethyl phosphate), Bayer 58733 (2,2,2-trichloro-N- (pentachlorophenyl) acetimidoy1 chloride), and 2 petroleum oils also were effective. GS-19851 was the most effective material on T. urticae. Nearly as effective were Morestan, Lovozal, EP-333, and Azodrin. Bayer 58733 caused a rather severe defoliation of the trees, the only phytotoxicity observed.

Document Type: Research Article

Publication date: August 1, 1969

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  • 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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