Hostname: page-component-586b7cd67f-t8hqh Total loading time: 0 Render date: 2024-11-24T23:47:26.110Z Has data issue: false hasContentIssue false
  • English
  • Français

Selectivity of Pyriclor on Witchweed, Tobacco, and Other Plants

Published online by Cambridge University Press:  12 June 2017

Jim E. Dale
Jim E. Dale*
Affiliation:
U. S. Dep. of Agr., Witchweed Laboratory, Whiteville, North Carolina
Get access Rights & Permissions [Opens in a new window]

Abstract

Postemergence directed application of 0.56 kg/ha of 2,3,5-trichloro-4-pyridinol (pyriclor) gave control of witchweed (Striga lutea Lour.) equivalent to 2.24 kg/ha of (2,4-dichlorophenoxy)acetic acid (2,4-D) without injuring corn (Zea mays L.). Pyriclor applied to the soil surface or incorporated did not significantly injure tobacco (Nicotiana tabacum L.) at rates of 2.24 kg/ha and less. Peanut (Arachis hypogaea L.) was not injured by pyriclor incorporated in soil at 0.56 kg/ha; Irish potato (Solanum tuberosum L.) was slightly injured. Treatment with 0.56 kg/ha of pyriclor applied in the same manner killed six crop species and four weed species also included in the experiment. In 2 years of field experiments, application of pyriclor at 0.21 and 0.63 kg/ha to soil before transplanting, or these rates applied over the top of tobacco after transplanting, controlled large crabgrass (Digitaria sanguinalis L. Scop.) until maturity of the tobacco, and did not significantly reduce yield or cause permanent injury to the crop.

Type
Research Article
Information
Weed Science , Volume 19 , Issue 1 , January 1971 , pp. 90 - 93
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. Buchholtz, K. P. 1968. Control of quackgrass with pyriclor. Weeds 16:439–441.Google Scholar
2. Freeman, J. F., Slack, C., and Darding, R. L. 1966. Directed postemergence herbicide sprays for weed control in corn. Res. Rep. No. Centr. Weed Contr. Conf. 23:84.Google Scholar
3. Garris, H. R. and Wells, J. C. 1956. Parasitic herbaceous annual associated with corn disease in North Carolina. Plant Dis. Rep. 40:837–838.Google Scholar
4. Huraux, M. J. and Lawson, H. M. 1956. Chemical and biological properties of 2,3,5-trichloro-4-pyridinol. Proc. Europe. Weed Res. Council. 2nd Symp. on New Herbicides, Paris. pp. 261–268, 269–275.Google Scholar
5. Klingman, G. C. and Guedez, H. 1967. Picloram and its effects on field-grown tobacco. Weeds 15:142–146.Google Scholar
6. Langston, M. A., Eplee, R. E., and Sand, P. F. 1968. Monitoring 2,4-D in soil. Proc. So. Weed Conf. 21:332–334.Google Scholar
7. McWhorter, C. G. and Holstun, J. T. Jr. 1961. Phytotoxicity of s-triazine herbicides to corn and weeds as related to structural differences. Weeds 9:592–599.Google Scholar
8. Robinson, E. L. 1958. Seeks control for witchweed–progress report. What's New in Crops and Soils 10(8): 14–15.Google Scholar
9. Robinson, E. L. and Dowler, C. C. 1961. Herbicides for the control of witchweed (Striga asiatica) in early and late planted corn. Weeds 9:522–526.CrossRefGoogle Scholar
10. Wilson-Jones, K. 1953. The witchweed of Africa. World Crops 5:263–339.Google Scholar
11. Wilson-Jones, K. 1953. Further experiments on witchweed control. I. The effect of hormone weed-killer applications at different rates and times on irrigated durra. Empire J. Exp. Agr. 21:331–339.Google Scholar
12. Wright, W. G. 1966. Weed control in sorghums. Res. Rep. No. Centr. Weed Contr. Conf. 23:84.Google Scholar