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Worldwide Distribution of Purple and Yellow Nutsedge (Cyperus rotundus and C. esculentus)

Published online by Cambridge University Press:  12 June 2017

Leo E. Bendixen  and
U. B. Nandihalli
Leo E. Bendixen
Affiliation:
Dep. Agron., Ohio State Univ., Columbus, OH 43210
U. B. Nandihalli
Affiliation:
Dep. Agron., Ohio State Univ., Columbus, OH 43210
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Extract

The family Cyperaceae includes approximately 3000 species, of which about 220 species are identified as weeds (Table 1). Nearly 42% of these weeds are in the genus Cyperus. An additional 43% are in three other genera, Eleocharis, Scirpus, and Fimbristylis. The remaining 15% are found in six other genera, Scleria, Kyllinga, Rhynchospora, Bulbostylis, Fuira, and Dichromena. Purple nutsedge (Cyperus rotundus L. # CYPRO) was identified as the world's worst weed based on the number of countries where it was reported as a serious, principal, or common weed. Competition with crops was the major factor in determining weediness. From the same report, yellow nutsedge (Cyperus esculentus L. # CYPES) ranked sixteenth. This contrasts with relative rankings of these two species in the United States where yellow nutsedge is more widespread than purple nutsedge.

Type
Symposium
Information
Weed Technology , Volume 1 , Issue 1 , January 1987 , pp. 61 - 65
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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