Persistence and Mobility of Isazofos in Turfgrass Thatch and Soil
Authors: Niemczyk, H. D.; Krueger, H. R.
Source: Journal of Economic Entomology, Volume 80, Number 4, August 1987 , pp. 950-952(3)
Publisher: Entomological Society of America
Abstract:Isazofos was applied to turfgrass as an emulsifiable concentrate (480 g/liter) at 2.24 kg (AI)/ha. Irrigation regimes included application of 10.2 liters/m2 water immediately, and 8, 24, and 36 h after treatment. Persistence and movement of the insecticide was measured by gas chromatographic analyses of core samples of thatch, and first and second 2.5 cm of soil at 3 h, 3 d, and 1, 2, 4, 8, 36 wk after treatment. Green grass was removed and not analyzed. The thatch contained 96–99% of detectable residues recovered with a range of 0.123 (8 wk) to 3.57 ppm (3 h). Immediate posttreatment irrigation resulted in significantly higher residues in the thatch during the first 2 wk of sampling. Residues in the first and second 2.5 cm soil during the 8-wk sampling period ranged from 0.002 to 0.04, and 0.024 to <0.001 ppm, respectively. At 36 wk, residues were ≤0.045 in the thatch, ≤0.003 in the first, and ≤0.001 ppm in the second 2.5 cm soil. Although useful in moving the insecticide off the grass blades and into the thatch, posttreatment irrigation had no significant effect on movement of the insecticide into the soil.
Document Type: Research Article
Publication date: August 1, 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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