Author
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Webster, Theodore |
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Submitted to: Weed Science Society of America Meeting Abstracts
Publication Type: Abstract Only Publication Acceptance Date: 5/1/2000 Publication Date: 2/1/2001 Citation: Webster, T.M. 2001. Cultural practices in cotton affect weed seed production [abstract]. Weed Science Society of America Abstracts. 41:27. Interpretive Summary: Technical Abstract: Growers annually spend in excess of $1 billion to control weeds, a concern consideringtherisingcostofinputsanddecliningcommodityprices. While a desirable short-term weed management objective is to control weeds, ultimately systems must strive to reduce weed populations. A means of potentiallyreducingweedpopulationsistocombinecurrentweedmanagement twith cultural practices aimed at increasing crop competitiveness and minimizingweedseedproduction.FieldstudieswereconductedinTifton, GA to evaluate the ability of cotton density and row spacing pattern to suppress weed seed production. Regression analysis indicated an inverse linear relation between weed seed production (for both sicklepod and smallflower morningglory) and cotton density. There was a linear relation between sicklepod seed production and sicklepod plant biomass; higher cotton densities tended to result in lower sicklepod seed production and biomass accumulation. A correlation also existed between cotton lint yiel and weed seed production (for both sicklepod and smallflower morningglory). While there is not a direct cause and effect relation, this relation indicates conditions that favor increased cotton lint yields also tend to suppress weed seed production. A linear relation existed between sicklepod seed production and biomass in the row spacing study. Sicklepod plants grown in the 91 cm cotton rows produced more seeds and accumulated more biomass than those in the UNR cotton. |
