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Common Cocklebur (Xanthium strumarium) Root and Shoot Interference in Soybeans (Glycine max)

Published online by Cambridge University Press:  12 June 2017

Emilie E. Regnier ,
Edward W. Stoller  and
Emerson D. Nafziger
Emilie E. Regnier
Affiliation:
Dep. Agron., Univ. Illinois
Edward W. Stoller
Affiliation:
U.S. Dep. Agric. Res. Serv.
Emerson D. Nafziger
Affiliation:
Dep. Agron., 1102 S. Goodwin, Urbana, IL 61801
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Abstract

Common cocklebur root and shoot interferences were investigated as factors causing soybean yield reductions in the field. Significant decreases in soybean yield resulted from common cocklebur shoot interference when the two were grown together with the common cocklebur roots confined in plastic bags. Soybean yield decreased further when common cocklebur roots were not confined, but this decrease resulted, in part, from increased common cocklebur shoot growth. Wire mesh cylinders of varying diameters, placed in gaps in the soybean rows and designed to spatially restrict soybean shoot growth, reduced yield more than did gaps alone. When similar cylinders lined with black plastic were placed next to the soybean rows to restrict both within-canopy light and space for soybean shoot growth, soybean yield was reduced most (44%) with concomitant changes in stem height, stem diameter, lodging, and branches, nodes, and pods/plant. Interference of common cocklebur with soybeans resulted primarily from shoot interference, and competition for light within the soybean canopy implicated as the major factor causing the soybean yield reduction.

Keywords

Common Cocklebur, Xanthium strumarium L. ♯3 XANSTsoybean Glycine max L., ‘Wells,’ ‘Williams,’ velvetleaf, Abutilon theophrasti Medik. ♯ ABUTHjimsonweed, Datura stramonium L. ♯DATSTCompetitionlightshadespaceAbutilon theophrastiDatura stramonium
Type
Weed Biology and Ecology
Information
Weed Science , Volume 37 , Issue 3 , May 1989 , pp. 308 - 313
Copyright
Copyright © 1989 by the Weed Science Society of America 

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References

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