Controlling rough bluegrass (Poa trivialis) - UNL

Kentucky bluegrass, Fescue, Rye and Bent, etc
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Charley
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Joined: September 17th, 2013, 11:13 pm
Location: Kentucky
Grass Type: Tall Fescue
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Controlling rough bluegrass (Poa trivialis) - UNL

Post by Charley » May 31st, 2017, 10:11 am

Article from University of Nebraska - Lincoln
http://turf.unl.edu/turfinfo/5-18_Poa_triv.pdf

Bottom line - It is not easy.

Nonselective control
1. Rough bluegrass is most consistently controlled with glyphosate in spring. In research, I’ve consistently seen 69 to 99% control with spring applications. In contrast, midsummer applications provided 14 to 91% control, and late-summer applications were marginally more effective (42 to 94% control).
2. No matter when you treat, seed or sod to reduce the reestablishment of rough bluegrass, and the new establishment of other weeds.
3. It’s often necessary to use glyphosate in the same areas over multiple years to achieve control.

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