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Seasonal Development of Yellow and Purple Nutsedges (Cyperus esculentus and C. rotundus) in Illinois

Published online by Cambridge University Press:  12 June 2017

J. E. Jordan-Molero
Affiliation:
Agron. Dep., Univ. of Illinois
E. W. Stoller
Affiliation:
Sci. Ed. Admin., U.S. Dep. of Agric. Agron. Dep., Univ. of Illinois, Urbana, IL 61801

Abstract

Yellow nutsedge (Cyperus esculentus L.) and purple nutsedge (C. rotundus L.) were grown in clay pots in the field to investigate the effect of sunlight intensity, planting date, and harvesting date on growth and development. Reducing the length of the growing season by delayed planting or early harvesting reduced the growth (dry matter accumulation) and tuber production of both species. Purple nutsedge growth (dry matter accumulation) was linearly reduced at 30 and 73% shade, but yellow nutsedge growth at 30% shade was not different from that at full sunlight. Tuber production in both species began about August 1, with slight delays in the initiation of tuber growth as planting date was delayed. At the end of the growing season a significant number of tubers were formed in both species even at the latest planting date under 73% shade.

Type
Research Article
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

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