African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6576

Full Length Research Paper

Weed management in winter wheat (Triticum aestivum L.) influenced by different soil tillage systems

José M. G. CALADO1,2*, Gottlieb BASCH1,2, José F. C. BARROS1,2 and Mário de CARVALHO1,2
1Department of Crop Science, University of Évora, Apartado 94, 7002-554 Évora, Portugal. 2Institute of Mediterranean Agricultural and Environmental Sciences (ICAAM), Apartado 94, 7002-554 Évora, Portugal.
Email: [email protected]

  •  Accepted: 23 May 2013
  •  Published: 06 June 2013

Abstract

In this study, weed management in winter wheat influenced by different soil tillage systems was investigated. The experiment was carried out under Mediterranean conditions on a Luvisol, during two growing seasons (1996/1997 and 1999/2000). Two factors (different soil tillage systems and post-emergence weed control) were studied, with two levels each: Two soil tillage systems and two levels of post-emergence weed control.  The conventional soil tillage system, performed for seedbed preparation after the emergence of a high percentage of weeds, increases the appearance of monocotyledons, especially Lolium rigidum Gaud. in wheat crops, when compared to their establishment in no-till system. As a consequence of the higher number of monocotyledons there is an increase in weed-crop competition. Without post-emergence herbicide treatment, the wheat crop yield is lower in the treatments with the conventional soil tillage system and yield reduction is less under no-till system compared to the respective treatments with post-emergence herbicide application.

 

Key words: No-till system, weeds, wheat, herbicides.