Abstract
Field studies were conducted in northeastern Mexico in 1992 and 1993 to determine the effect of wild sunflower density on its own growth and interference in spring wheat, and the effectiveness of triasulfuron and thifensulfuron on wild sunflower chemical control. Full -season interference of wild sunflower at 2, 4, 8, 16, and 32 plants/m2 decreased spring wheat grain yields by 27, 49, 60, 71 and 75%, respectively, compared to weed-free plots. Wild sunflower was more competitive with spring wheat at low densities and intraspecific interference was evident at 12 plants/m2. As a result of intraspecifíc interference, individual wild sunflower weight decreased and height increased as number of plants/m2 increased. Triasulfuron at 10.1 g/ha and thifensulfuron at 18.8 g/ha provided excellent (> 90%) wild sunflower control and adequate wheat yields. This research indicates that wild sunflower at densities as low as 1 plant/m2 reduces spring wheat grain yield signifícantly, and that both triasulfuron and thifensulfuron are good options for its chemical control.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Belles, W.S. 1989. Control of broadleaf weeds in winter wheat with dicamba-sulfonylurea combinations. Res. Prog. Rep. West Soc. Weed Science p: 356–357.
Castro, M.E. 1987. Control químico de maleza de hoja ancha en trigo en el noreste de Mexico. Memorias VIII Congreso Nacional de la Ciencia de la Maleza. San Luis Potosí. p: 283–294.
Geier, P.W., L.D. Maddux, L.J. Moshier, and P.W. Stahlman. 1996. Common sunflower (Helianthus annuus) interference in soybean (Glycine max). Weed Technol. 10: 317–321.
Gillespie, G.R. and S.D. Miller. 1984. Sunflower competition in wheat. Can. J. Plant Sci., 64: 105–111.
Irons, S.M. and O.C. Burnside. 1982. Competitive and allelopathic effects of sunflower (Helianthus annuus). Weed Sci., 30: 372–377.
Lentner, M. and T. Bishop. 1993. Experimental design and analysis. 2nd Ed. Blacksburg, VA: Valley Book Company. pp. 63–64.
Myers, R.H. 1990. Classical and modern regression with applications. 2nd Ed. Boston, MA: PWS-Kent Publ. Co. pp. 135–140.
[SAS] Statistical Analysis System. 1989. SAS/STAT User’s guide. Version 6. 4th Ed. Volume 2. Cary, NC. 846 p.
Schweizer, E.E. and L.D. Bridge. 1992. Sunflower (Helianthus annuus) and velvetleaf (Abutilon theophrasti) interference in sugarbeets Beta vulgaris). Weed Sci., 30: 514–519.
Stowe, L.G. and A. Osborn. 1980. The influence of nitrogen and phosphorus levels on the phytotoxicity of phenolic compounds. Can. J. Bot., 58: 1149–1153.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Rosales-Robles, E., Salinas-García, J.R., Sánchez-de-la-Cruz, R. et al. Interference and Control of Wild Sunflower (Helianthus annuus L.) in Spring Wheat (Triticum aestivum L.) in Northeastern Mexico. CEREAL RESEARCH COMMUNICATIONS 30, 439–446 (2002). https://doi.org/10.1007/BF03543441
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF03543441