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Laboratory Trials of Six Polybutene Emulsions against the Two- Spotted Spider Mite1

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Six grades of polybutene gave high mortalities of mites (Tetranychus telarius (L.)) when applied as emulsions containing at least 2..5% or polybutene by weight. In general mortality decreased with increasing viscosity of the polybutenes. Uniform leaf coverage was essential; it varied with polybutene viscosity and emulsion concentration. A 2.5% concentration of all grades had some residual effect which decreased with age. Emulsions combined with captan or applied over dry deposits of some pesticides were less effective. Only the least viscous grade was phototoxic at concentrations below 5%. Mechanical trapping was not the only mode of action.

Document Type: Research Article

Publication date: December 1, 1962

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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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