Steve from Pleasantville, Oh writes,
Will Tenacity affect all varieties of Poa?
I have what I believe is Poa but am not certain of the variety (annua or other). How can I determine what I have?
Tenacity Herbicide is not labeled to control Poa Annua/Annual Bluegrass in a post emergent application, it only states that it could cause injury to it if sprayed. It is only labeled to be used to suppress poa annua when used as a pre-emergent. We recommend to contact your Cooperative Extension Office and speak with the Master Gardener to identify the weed species you need to treat for.
Answer last updated on: 05/18/2015