Evaluation of Dichlorvos for Insect Control in Stored Rough Rice
Author: MCGAUGHEY, W. H.
Source: Journal of Economic Entomology, Volume 63, Number 6, 15 December 1970 , pp. 1867-1870(4)
Publisher: Entomological Society of America
Abstract:Dichlorvos was evaluated as a direct-spray application at 5, 10, 15, and 20 ppm in comparison with malathion at 14 ppm for insect control in rough rice. Jar tests and small-bin tests were used. Jar tests revealed short-term protection by dichlorvos against infestation by rice weevils, Sitophilus oryzae (L.), and lesser grain borers, Rhyzopertha dominica (F.). Confused flour beetles, Tribolium confusum Jacquelin duVal, were controlled immediately after treatment but not at subsequent intervals. Dichlorvos was more effective than malathion in reducing rice weevil emergence. While high moisture content of the rice at the time of treatment adversely affected the duration of protection, it had no obvious immediate effect, because nearly complete control of the rice weevil was obtained at the time of treatment. This control occurred in jar tests and in small bin tests. Residues on rough rice were as high as 7.3 ppm 24 hr after treatment, but in 30 days they were 0.87 ppm on rough rice, 3.1 in hulls, 0.41 in bran, 0.03 in brown rice, and 0.02 in milled rice.
Document Type: Research Article
Publication date: December 15, 1970
- 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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