Weed control using allelopathic sunflowers and herbicide Authors
Received: 26 March 1986 Revised: 15 September 1986 DOI:
Cite this article as: Leather, G.R. Plant Soil (1987) 98: 17. doi:10.1007/BF02381723 Summary
Field studies were conducted to determine if season long weed control could be achieved by combining the use of an herbicide with the natural allelochemicals produced by cultivated sunflower (
Helianthus annuus L.). The weed biomass was reduced equally in plots planted with sunflowers, whether or not the herbicide was applied in each of 4 years. Weed control diminished the second year in all plots that received the same treatments as had been applied the previous year. This diminished efficacy was attributed to reduced emergence of sunflower (13.5 to 45.2 percent) in second-year plots, as a result of autotoxicity from sunflower crop residues remaining after the first-year harvest. Key words Allelopathy Autotoxicity Sunflower yield Weed biomass References
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© Martinus Nijhoff Publishers 1987