Metabolism of ( sup 14 C)quizalofop-ethyl in soybean and cotton plants

Journal Article · Sun Apr 01 04:00:00 EDT 1990 · Journal of Agricultural and Food Chemistry; (USA)

DOI:https://doi.org/10.1021/jf00094a039· OSTI ID:6274819

Koeppe, M K; Anderson, J J; Shalaby, L M ^[1]

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

The metabolism of (phenyl-U-{sup 14}C)quizalofop-ethyl or (quinoxaline-{sup 14}C)quizalofop-ethyl was investigated in soybean and cotton plants. ({sup 14}C)Quizalofop-ethyl was applied to soybean or cotton plants at 4 oz of AI/acre as a postemergence spray, and plant samples were harvested initially (day 0) and at 3, 6, and 13.5 (maturity) weeks after treatment. No detectable {sup 14}C residues (< 0.01 ppm) were found in mature beans or pods, whereas the mature fiber and seeds from the cotton contained 0.08 and 0.09 ppm total {sup 14}C residues, respectively. The proposed metabolic pathway of quizalofop-ethyl was similar in both soybean and cotton plants. In the foliage, quizalofop-ethyl was rapidly metabolized to 2-4-(6-chloroquinoxalin-2-yl)oxy-phenoxypropanoic acid (quizalofop) that metabolized to the phenol metabolites 6-chloroquinoxaline-2-ol and 2-(4-hydroxyphenoxy)propanoic acid. Glucose conjugates of quizalofop possibly were formed since addition of {beta}-glucosidase to aqueous extracts (containing polar {sup 14}C residues) of soybean foliage slowly released ({sup 14}C)quizalofop.

• OSTI ID: 6274819
• Journal Information: Journal of Agricultural and Food Chemistry; (USA), Journal Name: Journal of Agricultural and Food Chemistry; (USA) Vol. 38:4; ISSN JAFCA; ISSN 0021-8561
• Country of Publication: United States
• Language: English

Related Subjects

550501* -- Metabolism-- Tracer Techniques
553000 -- Agriculture &amp; Food Technology
560300 -- Chemicals Metabolism &amp; Toxicology
59 BASIC BIOLOGICAL SCIENCES
60 APPLIED LIFE SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AGRICULTURE
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBON 14
CARBON ISOTOPES
COTTON PLANTS
EVEN-EVEN NUCLEI
FOOD
HERBICIDES
INDUSTRY
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
MAGNOLIOPHYTA
MAGNOLIOPSIDA
METABOLISM
METABOLITES
NUCLEI
PESTICIDES
PLANTS
RADIOISOTOPES
RESIDUES
SOYBEANS
TRACER TECHNIQUES
VEGETABLES
YEARS LIVING RADIOISOTOPES