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Selective Creeping Bentgrass (Agrostis stolonifera) Control in Cool-Season Turfgrass

Published online by Cambridge University Press:  20 January 2017

Josh B. Beam ,
Whitnee L. Barker  and
Shawn D. Askew
Josh B. Beam
Affiliation:
Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic Institute and State University, 435 Old Glade Road, Virginia Tech Box 0330, Blacksburg, VA 24060-0330
Whitnee L. Barker
Affiliation:
Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic Institute and State University, 435 Old Glade Road, Virginia Tech Box 0330, Blacksburg, VA 24060-0330
Shawn D. Askew*
Affiliation:
Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic Institute and State University, 435 Old Glade Road, Virginia Tech Box 0330, Blacksburg, VA 24060-0330
*
Corresponding author's E-mail: [email protected]
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Abstract

Creeping bentgrass infestations in cool-season turfgrass are unsightly and difficult to control. Field tests were conducted at Stoney Creek Golf Course in Wintergreen, VA, in 2002 and 2003 on a Kentucky bluegrass rough and at the Turfgrass Research Center in Blacksburg, VA, in 2003 on a perennial ryegrass lawn to determine the efficacy of imazaquin, isoxaflutole, and mesotrione for creeping bentgrass control and turfgrass tolerance. Isoxaflutole and mesotrione each applied in two sequential applications at 280 g ai/ha or three sequential applications at 170 or 60 g/ha and imazaquin in two sequential applications at 390 g/ha controlled bentgrass at least 92% 14 wk after initial treatment (WAIT) at all locations. Sequential applications were applied at 2-wk intervals. Isoxaflutole and mesotrione, regardless of rate or sequential treatment, injured turfgrass less than 20% at all rating dates and locations. Imazaquin in two sequential applications at 390 g/ha injured Kentucky bluegrass and perennial ryegrass greater than 50% at all locations 14 WAIT. Results indicate isoxaflutole or mesotrione could be used for selective bentgrass control in Kentucky bluegrass or perennial ryegrass.

Keywords

Imazaquinisoxaflutolemesotrionecreeping bentgrass, Agrostis stolonifera L. # AGRSTKentucky bluegrass, Poa pratensis L. ‘Blacksburg’ and ‘Midnight’perennial ryegrass, Lolium perenne L. ‘Prosport’Golf course roughturfgrass injuryweed controlSCG, Stoney Creek Golf CourseTRC, Turfgrass Research CenterWAIT, weeks after initial treatment
Type
Research Article
Information
Weed Technology , Volume 20 , Issue 2 , June 2006 , pp. 340 - 344
Copyright
Copyright © Weed Science Society of America 

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