This was a laboratory investigation in which wire worms (Melanotus communis Gyll.) were exposed to granulated formulations of soil insecticides in quart-size Mason jars. The insecticides employed were aldrin and heptachlor (in separate experiments), and the carriers were No. 4 Vermiculite and 30-60 mesh clay. Insecticide concentration were 2,5, 10 and 20% on both carriers, plus 30 and 40% on Vermiculite and the insecticide dosages were 1.25, 2.5 and 5 pounds per acre. Final readings were made 21 days after the experiments were started. The following conclusions were reached as the result of this work. (1) Granulated Vermiculite was a very satisfactory carrier for both soil insecticides under the conditions of these experiments; No. 4 Vermiculite compared favorably with 30-60 mesh RVM-AA Attaclay. (2) When Vermiculite was used as the carrier for either aldrin or heptachlor there was some decease in insecticidal efficiency as the concentration of toxic ant increased, but the differences between concentration were not significant in either experiment. (3) With the Attaclay carrier in insecticidal efficiency as the concentration of toxic ant increased, and the number of particles correspondingly decreased, in both experiments.
Document Type: Research Article
Publication date: August 1, 1958
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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.