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Influence of pyrithiobac sodium on purple (Cyperus rotundus) and yellow nutsedge (C. esculentus)

Published online by Cambridge University Press:  12 June 2017

John W. Wilcut
John W. Wilcut*
Affiliation:
Crop Science Department, North Carolina State University, Raleigh, NC 27695-7620
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Abstract

Greenhouse studies were conducted to determine purple and yellow nutsedge response to selective placement of a 5-cm layer of pyrithiobac sodium-treated soil above, below, or above and below nutsedge tubers. Pyrithiobac sodium at 36 or 72 g ae ha−1 applied postemergence as foliar, soil, or foliar and soil treatments also was evaluated. Pyrithiobac sodium applied above, below, or above and below nutsedge tubers reduced yellow and purple nutsedge shoot number, shoot regrowth, and root-tuber dry weight at least 90%. Foliar-only treatment of pyrithiobac sodium was less effective at reducing emerged purple and yellow nutsedge numbers than application to soil only or to foliage and soil. Best reduction in yellow and purple nutsedge growth with pyrithiobac sodium was obtained with soil-incorporated treatments.

Keywords

Pyrithiobac sodiumpurple nutsedge, Cyperus rotundus L. CYPROyellow nutsedge, C. esculentus L. CYPESApplication methodapplication timingselective placement
Type
Weed Management
Information
Weed Science , Volume 46 , Issue 1 , February 1998 , pp. 111 - 115
Copyright
Copyright © 1998 by the Weed Science Society of America 

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