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1 May 2005 Italian Ryegrass (Lolium multiflorum) Control in Newly Seeded Tall Fescue
JOSH B. BEAM, WHITNEE L. BARKER, SHAWN D. ASKEW
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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.

Nomenclature: Chlorsulfuron; diclofop; fenoxaprop; fluazifop; metsulfuron; nicosulfuron; primisulfuron; Italian ryegrass, Lolium multiflorum Lam. #3 LOLMU; Kentucky bluegrass, Poa pratensis L. ‘Midnight’, ‘Millenium’; tall fescue, Festuca arundinacea Schreb. ‘Falcon III’, ‘Rebel II’.

Additional index words: Sod production, turfgrass injury, weed control.

Abbreviations: ESF, Enfield Sod Farm, Aylett, VA, 2002; TRC, Turfgrass Research Center, Blacksburg, VA, 2003; VTF, Virginia Turf Farm, Baskerville, VA, 2003; WAIT, weeks after initial treatment.

JOSH B. BEAM, WHITNEE L. BARKER, and SHAWN D. ASKEW "Italian Ryegrass (Lolium multiflorum) Control in Newly Seeded Tall Fescue," Weed Technology 19(2), 416-421, (1 May 2005). https://doi.org/10.1614/WT-04-179R1
Published: 1 May 2005
JOURNAL ARTICLE
6 PAGES


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