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Ethofumesate (trade names Prograss or PoaConstrictor) is one option for postemergence annual bluegrass control in cool-season turfgrasses such as perennial ryegrass, Kentucky bluegrass and tall fescue. Prograss is typically used in high-maintenance bermudagrass overseeded with perennial ryegrass. Make the first application 30 to 45 days after overseeding, then reapply 21 to 28 days later. Apply 1 lb ai/A for each application. Do not apply Prograss after December 31 to bermudagrass or spring greenup will be delayed. Prograss will not control annual bluegrass that has extensively tillered so don’t wait until November or December to make the first application.
Xonerate (amicarbazone) is a new herbicide registered by Arysta LifeScience that can be applied to most cool-season turfgrasses established 6 months for annual bluegrass control. Apply 2 to 4 oz/A twice at two to three week intervals.
Leon Warren and Dr. Fred Yelverton
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