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Control of Green and False-Green Kyllinga (Kyllinga brevifolia and K. gracillima) in Golf Course Fairways and Roughs

Published online by Cambridge University Press:  20 January 2017

J. Scott McElroy ,
Fred H. Yelverton  and
Leon S. Warren JR.
J. Scott McElroy*
Affiliation:
University of Tennessee, 2431 Joe Johnson Drive, 252 Plant Science Building, Knoxville, TN 37996
Fred H. Yelverton
Affiliation:
North Carolina State University, 4401 Williams Hall, Raleigh, NC 27695-7620
Leon S. Warren JR.
Affiliation:
North Carolina State University, 4401 Williams Hall, Raleigh, NC 27695-7620
*
Corresponding author's E-mail: [email protected]
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Abstract

Herbicides commonly used to control Cyperus spp. are not completely effective against Kyllinga spp. Field trials were conducted on North Carolina golf courses to evaluate green and false-green kyllinga control at fairway and rough golf course mowing heights. Treatments included single and sequential applications of bentazon (1.12 kg ai/ha), halosulfuron (0.07 kg/ha), MSMA (2.24 kg/ ha), and trifloxysulfuron (0.03 kg/ha); imazaquin (0.56 kg/ha) with and without MSMA; and two rates of sulfentrazone (0.42 and 0.56 kg/ha). Green or false-green kyllinga control was equivalent at fairway and rough mowing heights. Halosulfuron applied sequentially, imazaquin with and without MSMA, and trifloxysulfuron applied singly or sequentially, controlled green and false-green kyllinga 89 to 99% 10 wk after initial treatment (WAIT). However, Kyllinga spp. control decreased over the course of the study regardless of herbicide treatment. By one year after treatment (YAIT), bentazon or MSMA alone controlled green or false-green kyllinga 50% or less. No difference was observed in green or false-green kyllinga control between imazaquin vs. imazaquin plus MSMA, sulfentrazone 0.42 vs. 0.56 kg/ha, or trifloxysulfuron one vs. two applications at any rating date. Green kyllinga was seemingly more difficult to control than false-green kyllinga. Sequential applications of bentazon and MSMA, single applications of halosulfuron, sulfentrazone applied at 0.42 and 0.56 kg/ha, and single and sequential applications of trifloxysulfuron controlled false-green kyllinga at least 10% greater than green kyllinga at 1 YAIT. Further research is needed to assess the potential variation among Cyperus and Kyllinga spp. response to herbicides.

Keywords

Bentazon, halosulfuron, imazaquin, monosodium methanearsonate (MSMA), sulfentrazone, trifloxysulfuronbermudagrass, Cynodon sppfalse-green kyllinga, Kyllinga gracillima L.green kyllinga, Kyllinga brevifolia Rottb. # KYLBRMowing heightturfgrass managementWAIT, weeks after initial treatmentYAIT, year after initial treatment
Type
Research Article
Information
Weed Technology , Volume 19 , Issue 4 , December 2005 , pp. 824 - 829
Copyright
Copyright © Weed Science Society of America 

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