‘Riviera’ Bermudagrass Response to Pre-seeding Applications of Sulfonylurea Herbicides
2008
Willis, John B. | Ricker, Daniel B. | Askew, Shawn D.
Recent advancements in cold tolerance of seeded bermudagrass cultivars have allowed seeding to repair thin areas following winter kill. Areas devoid of bermudagrass are often unnoticed until herbicides are applied to remove perennial ryegrass and winter weeds from golf course fairways and athletic fields. Trials were conducted in Blacksburg, VA, with flazasulfuron, foramsulfuron, metsulfuron, rimsulfuron, sulfosulfuron, and trifloxysulfuron-sodium at 35, 28, 42, 35, 34, and 29 g ai/ha, respectively, applied 1 and 3 weeks before seeding (WBS) 'Riviera' bermudagrass to evaluate turf tolerance. Safety of these products can be ranked as follows: foramsulfuron = metsulfuron > rimsulfuron = sulfosulfuron > trifloxysulfuron-sodium = flazasulfuron. Results indicate foramsulfuron and metsulfuron can be used anytime prior to seeding bermudagrass, while some injury will occur from rimsulfuron and sulfosulfuron applications prior to seeding. Bermudagrass should not be seeded within 3 weeks of flazasulfuron or trifloxysulfuron-sodium treatments.
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