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Foliar vs. Soil Exposure of Green Kyllinga (Kyllinga brevifolia) and False-Green Kyllinga (Kyllinga gracillima) to Postemergence Treatments of CGA-362622, Halosulfuron, Imazaquin, and MSMA

Published online by Cambridge University Press:  20 January 2017

J. Scott McElroy ,
Fred H. Yelverton ,
Travis W. Gannon  and
John W. Wilcut
J. Scott McElroy
Affiliation:
Crop Science Department, P.O. Box 7620, North Carolina State University, Raleigh, NC 27695-7620
Fred H. Yelverton*
Affiliation:
Crop Science Department, P.O. Box 7620, North Carolina State University, Raleigh, NC 27695-7620
Travis W. Gannon
Affiliation:
Crop Science Department, P.O. Box 7620, North Carolina State University, Raleigh, NC 27695-7620
John W. Wilcut
Affiliation:
Crop Science Department, P.O. Box 7620, North Carolina State University, Raleigh, NC 27695-7620
*
Corresponding author's E-mail: [email protected]
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Abstract

Greenhouse studies were conducted to evaluate shoot number, shoot weight, rhizome weight, and root weight reduction of green and false-green kyllinga at three placement levels (soil applied, foliar applied, and soil + foliar applied) and five herbicide treatments (CGA-362622, halosulfuron, imazaquin, MSMA, and imazaquin + MSMA). Averaged over herbicide and placement level, false-green kyllinga shoot number 30 d after treatment (DAT) and rhizome weight 60 DAT were reduced more than those of green kyllinga. Furthermore, imazaquin, MSMA, and imazaquin + MSMA, averaged across placement levels, as well as CGA-362622 and halosulfuron, both foliar and soil applied, reduced false-green kyllinga shoot number greater than that of green kyllinga 60 DAT. Halosulfuron reduced false-green kyllinga shoot weight greater than that of green kyllinga 60 DAT; however, MSMA reduced green kyllinga greater. In general, foliar- and soil + foliar–applied treatments reduced shoot number (30 DAT), rhizome weight, and root weight of both kyllinga species greater than soil-applied treatments, whereas soil + foliar–applied treatments were more effective in reducing shoot weight 60 DAT. CGA-362622 and halosulfuron reduced kyllinga species shoot number (30 DAT), false-green kyllinga shoot weight (60 DAT), and root weight of both species greater than all other herbicides. However, CGA-362622 reduced green kyllinga shoot weight (60 DAT) and rhizome weight of both species greater than all other herbicides.

Keywords

CGA-362622, N-[(4,6-dimethoxy-2-pyrimidinyl)carbamoyl]-3-(2,2,2-trifluroethoxy)-pyridin-2-sulfonamide sodium salthalosulfuronimazaquinMSMAfalse-green kyllinga, Kyllinga gracillima L.green kyllinga, Kyllinga brevifolia Rottb. #3 KYLBRFoliar absorptionroot absorptionALS, acetolactate synthaseDAP, days after plantingDAT, days after treatmentNIS, nonionic surfactantPOST, postemergence
Type
Research
Information
Weed Technology , Volume 18 , Issue 1 , March 2004 , pp. 145 - 151
Copyright
Copyright © Weed Science Society of America 

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