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Confused: does Tenacity kill fine fescue?

6 years ago

I've been reading many threads about Tenacity killing fine fescues (I have some creeping red, and chewings as part of a KBG/P Rye/fescue mix) - think Scotts/Penningtons blends.

I don't want to kill any of these grasses. and indeed on the Tenacity info sheet - all of these desirable grasses seem like they should be safe from Tenacity, when used at the proper app rate.

But I read much about fine fescue being susceptible. I suppose any thing can be killed given enough dosage. Should I be concerned to lose FF if given the rate of 5oz/A, per the sheet, link here? I read people experiencing FF kill at lower rates than 5?

What am I missing?

Tenacity Info Sheet

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Comment (1)

beckyinrichmond
6 years ago
Scroll down to the question from John:

http://www.domyownpestcontrol.com/tenacity-herbicide-p-1877.html

I'll copy it here for readers browsing:

John from Great Neck, Ny

QWhat are the application instructions for Tenacity on fine fescue turf?
My lawn is fine fescue, and I overseed every spring and sometimes in fall. The label states not to use Tenacity at the same time as seeding fine fescue. Thus, what would be the best strategy to use Tenacity on my lawn for pre and post-emergent purpose? Should I look for an alternative product?

A

Per the Tenacity label, you will not exceed 5 fl. oz. of product per acre for fine fescue. This is just the max amount that should be used per year and per acre. The rate that should be used is you will need to mix 0.5 tsp of Tenacity and 1.5 tsp of surfactant to one gallon of water covering 1,000 sq ft. Also, Tenacity should NOT be applied at the time you are putting down new seeds or overseeding. This will likely inhibit their growth. You will want to wait until the lawn has been established before applying this product for pre-emergent control. This is generally after three mowings. There are no restrictions for Tenacity with regards to post-emergent control of weeds.

- See more at: http://www.domyownpestcontrol.com/tenacity-herbicide-p-1877.html#sthash.VFzwKzyo.dpuf

So it sounds like it's fine for one application per year on established fine fescue. The 0.55 teaspoon to one gallon of water over 1000 suare feet is the 4 oz per acre rate. Do you want to use this as a pre-emergent or post emergent? What weeds are you targeting?
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