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Competition Between Yellow Nutsedge (Cyperus esculentus) and Japanese Millet (Echinochloa crus-galli var. frumentacea)

Published online by Cambridge University Press:  12 June 2017

R. J. Thullen  and
P. E. Keeley
R. J. Thullen
Affiliation:
Agric. Res., Sci. Ed. Admin., U.S. Dep. Agric, Shafter, CA 93263
P. E. Keeley
Affiliation:
Agric. Res., Sci. Ed. Admin., U.S. Dep. Agric, Shafter, CA 93263
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Abstract

In field plots, Japanese millet [Echinochloa crus-galli (L.) Beauv. var. frumentacea (Link) W. F. Wight] competed strongly with yellow nutsedge (Cyperus esculentus L.), reducing its dry weight and the number of plants and tubers with no loss of dry weight to the millet. Because Japanese millet did not shade the nutsedge for more than half the day, the main competition was thought to be ‘root’ competition (nutrient and water) with light competition as a minor factor. The greenhouse studies verified that roots were the primary area of competition. However, light competition between the two species was stronger in the greenhouse than in field plots. Also, when confined to limited light and soil volumes with a 1-month growing period, Japanese millet was reduced in dry weight by nutsedge competition.

Keywords

Root competitionlight competition
Type
Research Article
Information
Weed Science , Volume 28 , Issue 1 , January 1980 , pp. 24 - 26
Copyright
Copyright © 1980 by the Weed Science Society of America 

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References

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