Weed control using allelopathic sunflowers and herbicide

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...

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Bibliographic Details
Published in:Plant and soil 1987-02, Vol.98 (1), p.17-23
Main Author: LEATHER, GERALD R.
Format: Article
Language:English
Subjects:
Allelopathy
Biomass
Crop management
Herbicides
Leathers
Plants
Sunflowers
Test ranges
Weed control
Weeds
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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.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF02381723