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Resistance to Acaricides in the European Red Mite1

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Populations of the European red mite, Panonychus ulmi (Koch), resistant to tetradifon in 1960 and 1961, were resistant to it in 1962. Tetradifon-resistant populations not resistant to Kelthane® (1,1-bis (p-chlorophenyl) -2,2,2- trichloroethanol) or to a Kelthane-tetradifon mixture in 1961 were resistant to these respective treatments in 1962. Kelthane-resistant populations resistant also to tetradifon in 1961, continued to be resistant to these treatments in 1962. Another Kelthane-resistant population not resistant to a Kelthane-tetradifon mixture in 1961 became resistant to it in 1962.

Populations of the European red mite that showed varying degrees of resistance to a Kelthane-tetradifon mixture and to alternate applications of Kelthane and tetradifon in the fourth year of exposure to these respective treatments exhibited strong resistance to them in 1962, the fifth year of exposure.

Populations of the European red mite in the fourth year of exposure to dimethoate, a dimethoate-tetradifon mixture, alternate applications of dimethoate and letradifon, a dimethoate-Kelthane mixture, and alternate applications of dimethoate and Kelthane showed strong resistance to these respective treatments.

Document Type: Research Article

Publication date: December 1, 1964

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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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