Effect of Light, Temperature, and pH on the Degradation of Azinphosmethy11,2
Authors: LIANG, T. T.; LIGHTENSTEIN, E. P.
Source: Journal of Economic Entomology, Volume 65, Number 2, April 1972 , pp. 315-321(7)
Publisher: Entomological Society of America
Abstract:Effects of light sources of different wavelengths, temperature, and pH values on the breakdown of 14C-azinphosmethyl in water or on glass surfaces were investigated. Primarily UV light (:2537A) and to a lesser extent sunlight, degraded the insecticide to chloroform and water-soluble, compounds, while the products from yellow (5889A) and red (6563A) light radiation were similar to those from non irradiated controls, With 2-dimensiona! thin-layer chromatography, autoradiography, and selective color producing reagents, benzazimide, anthranilic acid, methvl benzimide sulfide, and X-methyl bemazimide were identified as chloroform-soluble irradiation products and ,1 unidentified compounds were found to he water soluble. None of these was toxic to insects. A rapid degradation of the insecticide occurred only above 37. and to a greater extent in water than on a g-lass surface. Chloroform-soluble breakdown products were methyl benzazimide sulfide. N-methyl bemazimide, and bemazimide, and traces of merecaptomethyl bemazimide and the oxygen analogue of azinphosmethyl. Six unidentified water-soluble compounds also were isolated. The insecticide was relatively stb1e in water below pH 10. At pH 11. rhlorofonn-solnhle azinphosmethyl metaholites were primarily methyl bemazimide sulfide and bemazimide; however, the water phase contained 97.7% of the applied radiocarbon after chloroform extraction. Analyses of this extracted water indicated the presence of anthranilic acid and benzaizmide and 3 unidentified compounds.
Document Type: Research Article
Publication date: April 1972
- 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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