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Bentonite or attapulgus clay granules were found to be the most suitable substrates for general use with available types of dispersal equipment. The low volatile attapulgus clay particles were more desirable than attapulgus clay granules which tended to disintegrate in the presence of water and more quickly release the toxicant. The 30/60-mesh granules were preferred to larger granules. Granular formulations were found to be slightly more effective than spray formulations when equivalent amounts of toxicant per acre were applied. The practical dosage rate for granular treatments was found to be 50–100 lb/acre, depending upon toxicant used and the method of distribution. Uniformly dispersed over the surface of the ground these materials were effective for periods exceeding 10 months in greatly reducing or actually eliminating ant colonies established in citrus groves. Dispersal by aircraft was found to be the most effective method tested for applying granules. Residues occurring on and in the peel of fruit treated with air dispersions of chlordane and dieldrin granules were determined to be below established tolerances, and considerably lower than reported residues resulting from the use of these materials as aqueous sprays.
Document Type: Research Article
Publication date: April 1, 1965
More about this publication?
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.