Hostname: page-component-669899f699-2mbcq Total loading time: 0 Render date: 2025-04-24T14:46:42.161Z Has data issue: false hasContentIssue false
  • English
  • Français

Pyrazon, a Selective Herbicide for Sugar Beets

Published online by Cambridge University Press:  12 June 2017

Richard Frank
Richard Frank*
Affiliation:
Botany Department, Ontario Agricultural College, University of Guelph, Guelph, Ontario, Canada
Get access

Abstract

The selective properties of 5-amino-4-chloro-2-phenyl-3-(2H)-pyridazinone (pyrazon), a new herbicide for the control of weeds in sugar beets, were investigated. Common lambsquarters (Chenopodium album L.), redroot pigweed (Amaranthus retroflexus L.), and green and yellow foxtail (Setaria viridis (L.) Beauv. and S. glauca (L.) Beauv.) represented about 77% of the weeds emerging and developing with beets. The preemergence rate of 4 to 5 lb/A pyrazon satisfactorily controlled the two broadleaf weed species but was marginal in controlling foxtail. At 6 and 7½ lb/A, beet stands were reduced; however, because of the standard practice of overseeding, normal stands were possible and yields of roots and extractable sugar were unaffected. Preemergence applications of aqueous suspensions of pyrazon were more satisfactory than postemergence. The addition of miscible non-phytotoxic oils or adjuvants to aqueous mixtures greatly improved the postemergence activity of pyrazon. In spite of the occasional temporary beet injury, beets in the two to four-leaf stage seemed relatively tolerant to postemergence treatments. Control was excellent when weeds were treated in the seedling stage (i.e. between cotyledon and four true leaves).

Type
Research Article
Information
Weeds , Volume 15 , Issue 3 , July 1967 , pp. 197 - 201
Copyright
Copyright © 1967 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.)

Article purchase

Temporarily unavailable

References

Literature Cited

1. Bandeen, J. D., Jones, G. E., and Switzer, C. M. 1960. An investigation of the effects of various methods of herbicide application on weed control in sugar beets. J. Am. Soc. Sugar Beet Technol. 11:151–154.Google Scholar
2. Campbell, W. R. and Hanna, M. I. 1937. The determination of nitrogen by modified kjeldahl methods. J. Biol. Chem. 119:1–7.Google Scholar
3. Eckroth, F. G., Holst, E. M., and Cormary, C. E. 1958. Chemical control of annual grasses in sugar beets in Montana, Wyoming and Colorado. J. Am. Soc. Sugar Beet Technol. 10:156–164.Google Scholar
4. Fisher, A. 1962. 1-phenyl-4-amino-5-chlor-pyridazon-6 (PCA), als ein neues Rübenherbizid. Weed Res. 2:177–184.Google Scholar
5. King, E. J. 1932. XXXIII. The colorimetric determination of phosphorus. Biochem J. 26:292–297.Google Scholar
6. Lhoste, J., D'Ille, H. Casanova, A., et Durgeat, L. A. 1963. Essais en plein champ de desherbage selectif des betteraves par le chloro-amino-phenyl-pyridazone (PCA). Weeds Res. 3:52–65.Google Scholar
7. Nelson, R. T. 1952. Trials with herbicides for weed control in sugar beets. Proc. Am. Soc. Sugar Beet Technol. 7:121–125.Google Scholar
8. Nelson, R. T. 1954. Grass control in sugar beets with herbicides IPC, TCA, and DCU. Proc. Am. Soc. Sugar Beet Technol. 8:130–134.Google Scholar