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Basic Copper Arsenate—A New Insecticide: II. Insecticide and Phytotoxity Studies

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The preceding paper (Witman, Waters and Almy) described the chemical and physical properties of basic copper arsenate, Cu(CuOHASO4). This new insecticide was first made repeatedly in the laboratory by several methods until the conditions were determined for preparing a material with the most desirable physical and chemical properties from the standpoint of insecticidal and plant safety factors. Then several uniform 100-pound lots were made under controlled conditions in the chemical engineering laboratory. The materials used in the insecticide tests were lots of basic copper arsenate containing 44.8 per cent copper and 40.6 per cent As2O5, to which was added 2 per cent of zinc hydrate. This material had a particle size of 1 to 3 microns and a watersoluble As2O5 value of 0.15 per cent, when in equilibrium with CO2 of the air.

Document Type: Research Article

Publication date: February 1, 1939

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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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