Studies of Dimethoate for Control of California Red Scale

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Dimethoate at 0.5 or 0.75 Ib/100 gal was about as effective against California red scale, Aonidiella auranti (Maskell), as 0.4 or 0.5 Ib of parathion in field sprays. Combinations of 0.25 Ib of parathion and 0.25 Ib of dimethoate per 100 gal were equal to or better than 0.4 or 0.5 Ib of parathion used alone. Dimethoate was more toxic to scales on the fruit than those on the wood and parathion more toxic to scales on the wood. The combination of materials was about equally effective on fruit and wood. Effectiveness of both materials was reduced by spraying with water 24 hr after the insecticides were applied in laboratory-lathhouse experiments.

Document Type: Research Article

Publication date: June 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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