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Response of Four Improved Seeded Bermudagrass Cultivars to Postemergence Herbicides during Seeded Establishment

Published online by Cambridge University Press:  20 January 2017

J. Scott McElroy
Affiliation:
Plant Science Department, University of Tennessee, 2431 Joe Johnson Dr., Knoxville, TN 37996
Greg K. Breeden
Affiliation:
Plant Science Department, University of Tennessee, 2431 Joe Johnson Dr., Knoxville, TN 37996
Fred H. Yelverton
Affiliation:
Crop Sciences Department, North Carolina State University, 4401 Williams Hall, Raleigh, NC 27695-7620
Travis W. Gannon
Affiliation:
Crop Sciences Department, North Carolina State University, 4401 Williams Hall, Raleigh, NC 27695-7620
Shawn D. Askew
Affiliation:
Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic and State University, Blacksburg, VA 24061
Jeffrey F. Derr
Affiliation:
Department of Plant Pathology, Physiology, and Weed Science, Virginia Polytechnic and State University, Hampton Roads Agricultural Research and Extension Center, 1444 Diamond Springs Road, Virginia Beach, VA 23455

Abstract

Herbicides and herbicide prepackaged mixtures registered for use on established bermudagrass turf may cause significant injury to recently seeded bermudagrass cultivars, delaying full establishment. Research was conducted to evaluate the use of 12 herbicide treatments applied at onset of uniform stolon development (4 to 8 wk after seeding) to recently seeded ‘Princess 77,’ ‘Riviera,’ ‘Savannah,’ and ‘Yukon’ bermudagrass cultivars. In general, Yukon was more susceptible to herbicide injury than other cultivars. Atrazine at 1.1 kg ai/ha injured all cultivars 55 to 59% 14 d after initial treatment (DAIT), which lead to reduced bermudagrass cover 21 DAIT. Triclopyr + clopyralid at 0.63 + 0.21 kg ae/ha, respectively, injured Savannah and Yukon greater than other broadleaf weed herbicides (2,4-D + mecoprop + dicamba or 2,4-D + clopyralid + dicamba). Foramsulfuron did not injure or reduce bermudagrass cover of any cultivar evaluated at any rating date. The only adverse effect of trifloxysulfuron was a reduction in Riviera and Yukon ground cover at 21 DAIT. MSMA applied sequentially and quinclorac treatments did not injure or reduce ground cover of Savannah or Princess 77. MSMA applied sequentially and/or quinclorac injured and reduced ground cover of Riviera and Yukon; however, both cultivars completely recovered from MSMA or quinclorac injury by 42 DAIT.

Type
Research Article
Copyright
Copyright © Weed Science Society of America 

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