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Response of Two Yellow Nutsedge Varieties to Three Herbicides

Published online by Cambridge University Press:  12 June 2017

Jaime Costa
Affiliation:
Dep. Agron. Crop Sci., Oregon State Univ., Corvallis, OR 97331
Arnold P. Appleby
Affiliation:
Dep. Agron. Crop Sci., Oregon State Univ., Corvallis, OR 97331

Abstract

In greenhouse studies, Cyperus esculentus L. var. esculentus was less susceptible than C. esculentus L. var. leptostachyus Boeck. to preplant applications of 1.77 kg/ha of atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-s-triazine] or 0.5 kg/ha of metribuzin [4-amino-6-tert-butyl-3-(methylthio)-as-triazine-5-(4H)one]. C. var. esculentus was more susceptible than C. var. leptostachyus to postemergence applications of 2,4-D [(2,4-dichlorophenoxy)acetic acid] oil-soluble amine. C. var. esculentus had longer, slightly narrower, and more upright leaves; generally fewer but larger tubers; fewer rhizomes; and a lower frequency of flowers with less seeds per inflorescence than C. var. leptostachyus. Publications on C. esculentus should specify which variety was used.

Type
Research Article
Copyright
Copyright © 1976 by the Weed Science Society of America 

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