How do I control tall fescue and roughstalk bluegrass (Festuca arundinacea and Poa trivialis) in a home lawn in James City County Virginia?
Date of Correspondence: April 28, 2004 Website Resources: http://poa.trivialis.turfweeds.net Recommendation: Both species are cool-season perennial grasses that can be controlled selectively in warm-season grasses with repeat treatment of pronamide (Kerb), imazaquin (Image), and metsulfuron (Manor, Blade). These weeds can’t be selectively controlled in cool-season turfgrass such as turf-type tall fescue. The only option in cool-season lawns is to treat the weed with a nonselective chemical such as glyphosate (Roundup) and seed or sod the dead area in the lawn. Best time to treat is mid spring or early fall and repeat treatments every two weeks for a total of two to three treatments. Follow the label instructions to determine rates and number of applications that are appropriate for the product you choose.
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