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The breakdown of 14 C‐chlorfenvinphos in soils and in crops grown in the soils
Author(s) -
Bey K. I.,
Wright A. N.
Publication year - 1967
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740180403
Subject(s) - soil water , chemistry , horticulture , agronomy , biology , ecology
Soils of four different types were treated with a relatively high dosage level (15 ppm) of 14 C‐chlorfenvinphos and were stored at about 22° for four months. After this time the following radio‐labelled compounds were detected in the moist soils: unchanged chlorfenvinphos, 1.0‐4.7 ppm; 1‐(2′4′‐dichlorophenyl)ethan‐1‐ol, 0.06‐1.0 ppm; 2,4‐dichloroacetophenone, 0.1‐0.5 ppm; desethyl chlorfenvinphos, 0.1‐0.2 ppm; (2′,4′‐dichlorophenyl)ethan‐1,2‐diol, <0.03 ppm; salts or conjugates of desethyl chlorfenvinphos, 0.05‐0.6 ppm; 2,4‐dichlorophenyloxirane, <0.005 ppm; 2,4‐dichlorophenacyl chloride, <0.005 ppm. Soils were also treated with 3‐4 lb/ac 14 C‐chlorfenvinphos and cabbages, onions, and carrots were grown to maturity in the soils. The edible part of cabbages at harvest contained no detectable chlorfenvinphos or breakdown products of it when the limit of detectability was about 0.005 ppm. At harvest at 8‐10 weeks after soil application of chlorfenvinphos the edible roots of carrots contained 0.12 ppm of unchanged chlorfenvinphos, and onion bulbs contained 0.07 ppm. There was evidence of trace amounts of a compound, probably a salt or conjugate of desethyl chlorfenvinphos, in onions (<0.01 ppm) and in carrots (0.024 ppm or less). Carrots also contained traces (about 0.005 ppm) of 2,4‐dichloroacetophenone.