Fate of monocrotophos in the environment

Journal Article · Wed Jan 31 23:00:00 EST 1990 · Journal of Agricultural and Food Chemistry; (USA)

DOI:https://doi.org/10.1021/jf00092a051· OSTI ID:6522023

Lee, P W; Fukuto, J M; Hernandez, H; Stearns, S M ^[1]

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1. E.I. du Pont de Nemours and Co., Inc., Wilmington, DE (USA)

The fate of monocrotophos in the aqueous and soil environment was examined. Hydrolysis rates for monocrotophos are pH-dependent and follow first-order kinetics. The half lives of monocrotophos in pH 3 and 9 buffer solution at 25{degree}C are 131 and 26 days, respectively. N-Methylacetoacetamide and O-desmethylmonocrotophos were the major hydrolytic degradation products detected. There was no observable qualitative or quantitative difference when the aqueous and soil experiments were conducted in the dark or with exposure to sunlight. Soil metabolism studies showed rapid and extensive decomposition of monocrotophos and its soil metabolites to {sup 14}CO{sub 2} and unextractable residues. N-Methylacetoacetamide, N-(hydroxymethyl)monocrotophos, and 3-hydroxy-N-methylbutyramide were detected as soil degradation products. Soil TLC data indicated that monocrotophos was mobile under test conditions. Rotational crops planted at various time intervals after soil treatment contained low, if any, significant residue levels of monocrotophos or its metabolites.

• OSTI ID: 6522023
• Journal Information: Journal of Agricultural and Food Chemistry; (USA), Journal Name: Journal of Agricultural and Food Chemistry; (USA) Vol. 38:2; ISSN 0021-8561; ISSN JAFCA
• Country of Publication: United States
• Language: English

Related Subjects

553003* -- Agriculture & Food Technology-- Pest & Disease Control-- (1987-)
60 APPLIED LIFE SCIENCES
CARBON 14 COMPOUNDS
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DECOMPOSITION
INSECTICIDES
ISOTOPE APPLICATIONS
LABELLED COMPOUNDS
METABOLISM
METABOLITES
OXIDES
OXYGEN COMPOUNDS
PESTICIDES
SOILS
SURFACE WATERS
TRACER TECHNIQUES