Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-26T15:36:39.665Z Has data issue: false hasContentIssue false
  • English
  • Français

Metabolic Fate of Monuron and Diuron in Isolated Leaf Discs

Published online by Cambridge University Press:  12 June 2017

C. R. Swanson  and
H. R. Swanson
C. R. Swanson
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Metabolism and Radiation Research Laboratory, State University Station, Fargo, North Dakota 58102
H. R. Swanson
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Metabolism and Radiation Research Laboratory, State University Station, Fargo, North Dakota 58102
Get access Rights & Permissions [Opens in a new window]

Abstract

Leaf discs of cotton (Gossypium hirsutum L.), broadleaf plantain (Plantago major L.), soybeans (Glycine max Merrill), and corn (Zea mays L.) were incubated 1 hr in aqueous solutions of methyl- or ring-labeled 3-(p-chlorophenyl)-l,l-dimethylurea-14C (monuron) or carbonyl-labeled 3-(3,4-dichlorophenyl)-l,l-dimethyl-urea-14C (diuron). The loss of herbicide and formation of metabolites were determined at approximately 1-hr intervals up to 7 hr. Cotton leaf discs actively metabolized monuron to l-(p-chlorophenyl)-3-methylurea (monomethylmonuron), l-(p-chlorophenyl)urea (p-chlorophenylurea), and p-chloroaniline. Plantain leaf discs strongly metabolized diuron to l-(3-,4-dichlorophenyl)-3-methylurea (monomethyldiuron) and l-(3,4-dichlorophenyl)urea (3,4-dichlorophenylurea). Plantain degraded monuron less actively than diuron and cotton degraded diuron less rapidly than monuron. In soybean leaf discs, metabolism did not progress beyond the first demethylation, and corn leaf discs were unable to metabolize the herbicides in short-term studies.

Type
Research Article
Information
Weed Science , Volume 16 , Issue 2 , April 1968 , pp. 137 - 143
Copyright
Copyright © Weed Science Society of America 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Literature Cited

1. Fang, S. C., Freed, V. H., Johnson, R. H., and Coffee, D. R. 1955. Absorption, translocation and metabolism of radioactive 3-(p-chlorophenyl)-1,1 -dimethyl urea (CMU) by bean plants. J. Agr. Food Chem. 3:400–402.CrossRefGoogle Scholar
2. Geissbühler, H., Haselbach, C., Aebi, H., and Ebner, L. 1963. The fate of N′-(4-chlorophenoxy)-phenyl-NN-dimethylurea (C-1983) in soils and plants. II. Uptake and distribution within plants. Weed Res. 3:181–194.CrossRefGoogle Scholar
3. Geissbühler, H., Haselbach, C., Aebi, H., and Ebner, L. 1963. The fate of N′-(4-chlorophenoxy)-phenyl-NN-dimethylurea (C-1983) in soils and plants. III. Breakdown in soils and plants. Weed Res. 3:277–297.Google Scholar
4. Kelly, R. G., Peets, E. A., Gordon, S., and Buyske, D. A. 1961. Determination of C14 and H8 in biological samples by Schöniger combustion and liquid scintillation techniques. Anal. Biochem. 2:267–273.Google Scholar
5. Smith, J. W. and Sheets, T. J. 1967. Uptake, distribution, and metabolism of monuron and diuron by several plants. J. Agr. Food Chem. In press.CrossRefGoogle Scholar
6. Sweetser, P. B. 1963. Photoinactivation of monuron, 3-(p-chlorophenyl)-l,l-dimethylurea by riboflavin 5-phosphate. Biochim. et Biophys. Acta 66:78–85.Google Scholar