Effects of Grain Moisture Content on Residual Toxicity and Repellency of Malathion1
Author: WATTERS, F. L.
Source: Journal of Economic Entomology, Volume 52, Number 1, February 1959 , pp. 131-134(4)
Publisher: Entomological Society of America
Abstract:Malathion applied at 2 p.p.m. to wheat of 13.5% moisture content caused 99% mortality of the rusty grain beetle, Laemophloeus ferrugineus (Steph.) at 8 months after treatment; the wheat was stored in airtight containers at 48 F. A dosage of 16 p.p.m. was required for comparable control in wheat of 15.5% moisture content but this dosage was ineffective in wheat of 18% moisture content at 5 months after treatment. Repellency tests in wheat of 12, 15 and 17% moisture content treated at 4 or 8 p.p.m. the test insects being placed in adjoining untreated wheat, showed that adults of L. ferrugineusbut not of sitophitus granarius (L.) were repelled from wheat of 12% moisture content treated at 4 p.p.m.: mortalities of both species ranged from 84.8 to 100.0% in treated wheats. Reproduction of L. ferrugineus was reduced more than that of S. granarius in unevenly treated wheat. There was no adverse effete on the milling or baking quality of wheat treated with malathion at 4 or 8 p.p.m.
Document Type: Research Article
Publication date: February 1, 1959
- 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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