Greatly Accelerated Microbial Degradation of Aldicarb in Re-treated Field Soil, in Flooded Soil, and in Water
Author: Read, D. C.
Source: Journal of Economic Entomology, Volume 80, Number 1, February 1987 , pp. 156-163(8)
Publisher: Entomological Society of America
Abstract:Two successive annual applications of aldicarb, as subsurface band-in-row soil treatments at 4 kg (AI)/ha in the same field plots, resulted in development of strains of microorganisms that rapidly broke down aldicarb in acid mineral soils of pH above ca. 6.0. Concentration and time required for breakdown for laboratory applications of 10–750 g (AI)/g (ppm) of soil were positively correlated. Breakdown of these concentrations ranged from 1 to ca. 14 days. Concentrations higher than ca. 800 ppm appeared to retard bacterial action and inhibited fungal growth in the soil. A 5,000-ppm application inhibited fungal growth for >6 months and retarded growth during the following 6–8 months. Toxic residues from 2,000- to 5,000-ppm applications persisted for 6 months to 1 year or more in the moist soil but degraded faster in flooded soil. Breakdown of repeated 50- or 100-ppm applications was most rapid in alkaline and near-neutral acidic soil or water media, much slower at pH levels near 6.0, and negligible at pH levels below ca. 5.6. Rate of accelerated microbial degradation depended on pH and moisture content of the soil, amount applied per treatment, numbers of treatments, and time period between treatments of aldicarb.
Document Type: Research Article
Publication date: February 1987
- 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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