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Influence of Crownbeard (Verbesina encelioides) Densities on Peanut (Arachis hypogaea) Yield

Published online by Cambridge University Press:  20 January 2017

Rodney L. Farris  and
Don S. Murray
Rodney L. Farris
Affiliation:
Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK 74078
Don S. Murray*
Affiliation:
Department of Plant and Soil Sciences, Oklahoma State University, Stillwater, OK 74078
*
Corresponding author's E-mail: dmurray@okstate.edu
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Abstract

Field experiments were conducted at the Caddo Research Station near Ft. Cobb, OK and at the Agronomy Research Station near Perkins, OK to measure the effects of seven crownbeard (Verbesina encelioides) densities on peanut (Arachis hypogaea) yield. The seven densities evaluated were 0 (the weed-free check), 0.2, 0.4, 0.8, 1.6, 2.4, and 3.2 weeds/m of row. Data collected consisted of dry weed biomass and peanut yields. Correlation between weed density and dry weed biomass, dry weed biomass and peanut yield (kg/ha), dry weed biomass and peanut yield loss (percentage of check), weed density and peanut yield (kg/ha), and weed density and peanut yield loss (percentage of check) were evaluated. For each weed/m of row, dry weed biomass increased by 0.34 kg/m row. Dry weed biomass was a good predictor of peanut yield. For each kilogram of dry weed biomass/ m row, a 1900-kg/ha or 46.3% reduction in peanut yield occurred. Weed density was also a good predictor of peanut yield. A 559-kg/ha reduction or 16% increase in peanut yield loss occurred for each weed/m row. Peanut yield was reduced approximately 50% when crownbeard density increased to 3.2 weeds/m row.

Keywords

Crownbeard, Verbesina encelioides (Cav.) Benth. & Hook. f. ex Gray #3 VEEENpeanut, Arachis hypogaea L.Competitiondry weed biomass
Type
Research Article
Information
Weed Technology , Volume 20 , Issue 3 , September 2006 , pp. 627 - 632
Copyright
Copyright © Weed Science Society of America 

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