Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-20T01:19:58.503Z Has data issue: false hasContentIssue false
  • English
  • Français

Weed Control in Cowpea (Vigna unguiculata) in the Humid Tropics

Published online by Cambridge University Press:  12 June 2017

I. Okezie Akobundu
I. Okezie Akobundu*
Affiliation:
Weed Sci., Intl. Inst. Trop. Agric., P.M.B. 5320, Ibadan, Nigeria
Get access Rights & Permissions [Opens in a new window]

Abstract

At least two weedings within the first 5 weeks after sowing are necessary to minimize yield reduction caused by weeds in cowpea [Vigna unguiculata (L.) Walp.]. During a 3-yr study, a preemergence application of metolachlor [2-chloro-N-(2-ethyl-6-methylphenyl)-N-(2-methoxy-1-methylethyl)acetamide] at 2.0 to 3.0 kg/ha, DCPA (dimethyl tetrachloroterephthalate) at 10.0 kg/ha, or pendimethalin [N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine] at 2.0 or 2.5 kg/ha controlled most annual grasses effectively. Itchgrass (Rottboellia exaltata L.) was controlled with pendimethalin at 2.5 kg/ha, but metolachlor had no effect on this weed. These herbicides caused no crop injury and cowpea grain yield was as good as in the handweeded and weed-free plots. Alachlor [2-chloro-2′, 6′-diethyl-N-(methoxymethyl) acetanilide] applied preemergence at 2.0 kg/ha was effective against annual weeds, but was phytotoxic to cowpea.

Keywords

Rottboellia exaltataEuphorbia heterophyllachemical controlmetolachlorpendimethalin
Type
Research Article
Information
Weed Science , Volume 30 , Issue 4 , July 1982 , pp. 331 - 334
Copyright
Copyright © 1982 by the 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. Andersen, R. N., Lueschen, W. E., Warnes, D. D., and Nelson, W. W. 1974. Controlling broadleaf weeds in soybeans with bentazon in Minnesota. Weed Sci. 22:136–142.CrossRefGoogle Scholar
2. Barrentine, W. L. and McWhorter, C. G. 1972. Cocklebur control with BAY-94337 and bentazon in soybeans. Proc. South. Weed Sci. Soc. 25:104.Google Scholar
3. Burgis, D. S. 1967. Evaluation of herbicides on southern peas. Weeds 15:180–181.Google Scholar
4. Food and Agriculture Organization. 1975. Production Yearbook 29. FAO, Rome. 555 pp.Google Scholar
5. Glaze, N. C. 1970. Evaluation of herbicides on southern peas. Proc. South. Weed Sci. Soc. 23:192–194.Google Scholar
6. Hay, J. R. 1961. Preemergence weed control in soybeans with a mixture of two herbicides. Weeds 9:117–123.Google Scholar
7. Johnson, W. A. and Amling, H. J. 1964. Herbicides for weed control in southern peas. Proc. South. Weed Sci. Soc. 17:221.Google Scholar
8. Lageman, J. 1977. Traditional African Farming Systems in Eastern Nigeria. Weltforum Verlag, Munchen, Germany. 269 p.Google Scholar
9. McWhorter, C. G. and Anderson, J. M. 1976. Effectiveness of metribuzin applied preemergence for economic control of common cocklebur in soybean. Weed Sci. 24:385–390.Google Scholar
10. McWhorter, C. G. and Anderson, J. M. 1976. Bentazon applied postemergence for economic control of common cocklebur in soybeans. Weed Sci. 24:391–396.Google Scholar
11. Medrano, S. C., Avila, L. R., and Villasmil, P.J.J. 1973. Determination of the critical period of weed competition in cowpea [Vigna unguiculata (L.) Walp.]. Revista de la Facultad de Agronomia, Universidad de Zulia 2:7–13.Google Scholar
12. Moody, K. 1973. Weed control in cowpeas. Proc. Weed Sci. Soc. Nigeria. 3; 14–22.Google Scholar
13. Moody, K. and Whitney, W. K. 1974. The effect of weed and insect damage to developing cowpea and soybean seeds. Proc. Weed Sci. Soc. Nigeria 4:16–26.Google Scholar
14. Nangju, D. 1980. Effect of plant density, spatial arrangement, and plant type on weed control in cowpea and soybean. Pages 288–299 in Akobundu, I. O., ed. Weeds and their control in the humid and subhumid tropics. IITA Proc. Ser. No. 3.Google Scholar
15. Peter, E. J., Davis, F. S., Klingman, D. L., and Larson, R. E. 1961. Interrelations of cultivations, herbicides and methods of application for weed control in soybeans. Weeds 9:639–645.Google Scholar
16. Rachie, K. O. and Roberts, L. M. 1974. Grain legumes of the lowland tropics. Adv. Agron. 26:1–132.Google Scholar