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Metabolism of Pyrazon in Sugar Beets and Soil

Published online by Cambridge University Press:  12 June 2017

G. R. Stephenson  and
S. K. Ries
G. R. Stephenson
Affiliation:
Department of Horticulture, Michigan State University, East Lansing, Michigan
S. K. Ries
Affiliation:
Department of Horticulture, Michigan State University, East Lansing, Michigan
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Abstract

Sugar beets (Beta vulgaris L., var. MSU 126 × 5460) were treated with 5-amino-4-chloro-2-phenyl-3(2H)-pyridazinone (pyrazon) applied to the soil. The pyrazon was labeled with either 3H in the phenyl ring, or with 14C at the 4 and 5 positions of the pyridazinone ring. The disappearance of pyrazon and the appearance of metabolites in the soil and shoots were examined 1, 2, 4, 6, 8, 12, and 16 weeks after treatment. The total recoverable radioactivity decreased with time, but there was a greater loss of 3H-labeled compounds than 14C-labeled compounds from the soil. Thin-layer chromatography of the soil and shoot extracts revealed the presence of one metabolite in the soil and three metabolites in the plant. By co-chromatography with known pyrazon derivatives and by comparison of the labeling (14C, 3H, or both), the metabolites in the shoot were identified as N-(2-chloro-4-phenyl-3(2H)-pyridazinone)-glucosamine (hereinafter referred to as N-glucosyl pyrazon), 5-amino-4-chloro-3(2H)-pyridazinone (hereinafter referred to as ACP), and ACP-complex. The other moiety in the ACP-complex was not identified. The metabolite in the soil was identified as ACP, and was detectable 2 weeks prior to its appearance in the shoot, suggesting that it was absorbed from the soil.

Type
Research Article
Information
Weed Science , Volume 17 , Issue 3 , July 1969 , pp. 327 - 331
Copyright
Copyright © 1969 Weed Science Society of America 

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References

Literature Cited

1. Burger, T. F. 1967. Untersuchungen über den abbau von 14C-markiertem pyrazon in Zuckerruben. Fourth International Weed Control Congress. 30:8.Google Scholar
2. Fischer, A. 1967. Untersuchungen über den abbau von 1-phenyl-4-amino-5-chloro-pyridazon-6(PCA) im boden und pflanze. Journees Int. d'e'tude desherb. Selectif cult, better., 9-10 3. Marly-Le-Roi, p. 213–219.Google Scholar
3. Fischer, A. 1964. Die Wirkungsweise von Pyramin, p. 19–24. In Vorträge anlässlich der Wissenschaftlichen Aussprache über Chemische Unkrautbekampfung in Zuckerrüben mit Pyramin. (Badische Anilin – and Soda-Fabrik AG. Ludwigshafen am Rhein, Germany).Google Scholar
4. Ries, S. K., Zabik, M. J., Stephenson, G. R., and Chen, T. M. 1968. N-glucosyl metabolite of pyrazon in red beets. Weed Sci 16:40–41.CrossRefGoogle Scholar
5. Stephenson, G. R. and Ries, S. K. 1967. The movement and metabolism of pyrazon in tolerant and susceptible species. Weed Res. 7:51–60.CrossRefGoogle Scholar
6. Van Der Zweep, W. 1964. The reaction of sugarbeet and other test plants upon herbicides, p. 70–78. In Vorträge anlässlich der Wissenschaftlichen Aussprache über Chemische Unkrautbekampfung in Zuckerrüben mit Pyramin. (Badische Anilin –and Soda-Fabrik AG. Ludwigshafen am Rhein, Germany).Google Scholar
7. Wang, C. H. and Willis, D. L. 1965. Radiotracer methodology in Biological Science. Prentice Hall, Englewood Cliffs, New Jersey. 382 p.Google Scholar