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Jeff from Cincinnati, Ohio writes

Does Tenacity effect both post and pre-emergent POA/Annual Bluegrass?

I reseeded my lawn and have some POA in spots and I don't want to keep killing and reseeding. I would like to apply a pre-emergent that will break the seed drop germination cycle.


Tenacity is not labeled to control Poa Annua/Annual Bluegrass, it only states that it could cause injury to it if sprayed with tenacity. Since it is not specifically designed to control Poa Annua, a better product choice would be Echelon 4SC. Echelon 4SC is labeled for pre-emergent control of poa annua only. According to the product label Poa annua is a winter annual. Applications of Echelon 4SC Herbicide should be made in August or September to established, non overseeded turf before Poa Annua germinates. Consult your local Cooperative Extension Service for more specific applications timings for your local area since August and September are approximate timings.

Answer last updated on: 06/23/2013

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Tenacity Herbicide

Tenacity Herbicide

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