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Evidence That Sweet Potato (Ipomoea batatas) is Allelopathic to Yellow Nutsedge (Cyperus esculentus)

Published online by Cambridge University Press:  12 June 2017

Howard F. Harrison Jr.  and
Joseph K. Peterson
Howard F. Harrison Jr.
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., 2875 Savannah Hwy., Charleston, SC 29414
Joseph K. Peterson
Affiliation:
Agric. Res. Serv., U.S. Dep. Agric., 2875 Savannah Hwy., Charleston, SC 29414
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Abstract

In field studies, ‘Regal’ sweet potato greatly reduced yellow nutsedge growth when the two species were grown together using standard cultural practices. At the end of the growing season, yellow nutsedge shoot dry weight per m2 in plots where the two species were planted together was less than 10% of shoot weight in plots where nutsedge was grown alone. Presence of yellow nutsedge did not markedly affect sweet potato growth. When grown together in a greenhouse experiment designed to minimize the competitive effects of sweet potato on yellow nutsedge, yellow nutsedge growth was reduced more than 50% by sweet potato 8 and 12 weeks after planting. The most polar fraction of serially extracted sweet potato periderm tissue was highly inhibitory to yellow nutsedge root growth. These results indicate that sweet potato interference with yellow nutsedge under field conditions is partially due to allelopathy.

Keywords

Yellow nutsedge, Cyperus esculentus L. # CYPES, sweet potato, Ipomoea batatas L. (Lam.), ‘Regal’Root growth inhibitioninterferenceCYPES
Type
Special Topics
Information
Weed Science , Volume 39 , Issue 2 , June 1991 , pp. 308 - 312
Copyright
Copyright © 1991 Weed Science Society of America 

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References

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