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Relationship Between Insecticide-Acaricide Resistance and Field Control in Tetranychus urticae (Acari: Tetranychidae) Infesting Roses

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Abstract:

Field populations of the two spotted spider mite, Tetranychus urticae Koch, were collected and tested to determine levels of resistance. Resistance was detected to fenbutatin- oxide (resistance factor [HF], 2.6-464 at LC95), propargite (RF, 3.9-135 at LC95), and fluvalinate (RF, 11-51 at LC95). Field populations of T. urticae were then sprayed with each acaricide and numbers of mites present monitored weekly to determine the efficacy of the spray. Field control failure of propargite and f1uvalinatewas detected between RFs 88-135 and 23-51, respectively, at the LC95 level. There was no clear relationship between fenbutatin-oxide resistance and field control. Field control of T. urticae with fenbutatin-oxide appeared to be influenced by factors other than resistance.

Document Type: Research Article

Publication date: October 1, 1995

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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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