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Systemic Activity of Dimethoate Applied to Cotton Seeds1

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Dimethoate was not exceptionally effective as a systemic cottonseed treatment against the boll weevil (Anthonomus grandis Boheman) and cotton aphid (Aphis gossypii Glover). Applied as a seed treatment, dimethoate caused considerable reduction in seedling emergence.

Studies with P32labeled dimethoate applied as a cottonseed treatment indicated that the toxicant was most rapidly absorbed 1 to 3 days after planting. Dimethoate seed treatment did not reduce the total emergence of artificially deteriorated seed, but did reduce the rate of emergence somewhat. Seeds deteriorated for 2 days absorbed more dimethoate than seeds deteriorated for 0,1,3, or 4 days.

Dimethoate was found to be less toxic than phorate to boll Weevil larvae and adults.

Document Type: Research Article

Publication date: December 1, 1961

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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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