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Allen writes

Can Tenacity be applied to Kentucky Bluegrass to control invasive fescue?

I had some bugs and or mold kill small patches of the lawn. Fescue grew in and filled those bare spots. Will tenacity kill the invasive fescue? Can Tenacity be applied in the winter or fall as a pre-emergent?

Answer:

Tenacity Herbicide is labeled for use on Tall Fescue, Kentucky Bluegrass, Centipedegrass, Buffalograss, Perennial Ryegrass, Fine Fescue, St. Augustine Grass, so no it will not kill the fescue in your Kentucky Bluegrass lawn.  Tenacity is a systemic pre-emergent and postemergent herbicide for the selective contact and residual control of weeds in turfgrasses. When applied as a pre-emergent, Tenacity Herbicide should be applied before soil temperatures reach 55 degrees.  You can spot treat the fescue with a non-selective herbicide such as Killzall and reseed with bluegrass.

Answer last updated on: 12/02/2018

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Tenacity Herbicide

Tenacity Herbicide

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