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Bee Poisoning Versus Clover Aphid Control in Red Clover Grown for Seed1

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Twenty chemical treatments were tested for clover aphid (Anuraphis bakeri (Cowen)) control in red clover raised for seed in eastern Washington. Considering aphid control, safety to pollinators, and safety to aphid predators and parasites, the best materials were Trithion® (S-(p-chlorophenylthio) methyl O,O-diethyl phosphorodithioate), phosphamidon, phorate, and :Methyl Trithion® (S-(p-chlorophenylthio) methyl O,O-dimethyl phosphorodithioate) plus Trithion. Treatments must be applied about the fourth or fifth week after the hay cutting is taken to obtain maximum effectiveness. Aphid damage to seed production involves both reduction in weight of individual seeds and re- duction in number of seeds produced.

Document Type: Research Article

Publication date: December 1, 1960

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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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