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Italian Ryegrass (Lolium multiflorum) Control in Newly Seeded Tall Fescue

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 24061-0330
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 24061-0330
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 24061-0330
*
Corresponding author's E-mail: saskew@vt.edu
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Abstract

Infestations of Italian ryegrass are difficult to control and decrease marketability of cool-season sod. Tests were conducted at three locations in Virginia in 2002 and 2003 to determine herbicide control options for Italian ryegrass in 90:10 tall fescue: Kentucky bluegrass turfgrass seeded the previous fall. Chlorsulfuron, diclofop, fluazifop plus fenoxaprop, and metsulfuron controlled 5- to 30-tiller Italian ryegrass less than 50% 10 wk after initial treatment (WAIT). Nicosulfuron at 53 g ai/ha controlled Italian ryegrass 69 to 95% and injured turf no greater than 10% at all locations 10 WAIT. Primisulfuron at 53 g ai/ha controlled Italian ryegrass less than 30% in 2002 and 59 to 63% at two locations in 2003 10 WAIT and injured turf less than 5% at all locations. Results indicate nicosulfuron can be used for Italian ryegrass control in tall fescue or tall fescue and Kentucky bluegrass turf if temporary injury is acceptable.

Keywords

ChlorsulfurondiclofopfenoxapropfluazifopmetsulfuronnicosulfuronprimisulfuronItalian ryegrass, Lolium multiflorum Lam. # LOLMUKentucky bluegrass, Poa pratensis L. ‘Midnight’, ‘Millenium’tall fescue, Festuca arundinacea Schreb. ‘Falcon III’, ‘Rebel II’Sod productionturfgrass injuryweed controlESF, Enfield Sod Farm, Aylett, VA, 2002TRC, Turfgrass Research Center, Blacksburg, VA, 2003VTF, Virginia Turf Farm, Baskerville, VA, 2003WAIT, weeks after initial treatment
Type
Research Article
Information
Weed Technology , Volume 19 , Issue 2 , June 2005 , pp. 416 - 421
Copyright
Copyright © Weed Science Society of America 

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