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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
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
E-mail address:

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.

Type
Research Article
Copyright
Copyright © Weed Science Society of America 

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