Josh from Easton, Ct writes
Does certainty completely kill tall fescue, or only harm it? I'm looking to kill poa triv out of my fescue cool season lawn in a few spots. I'm thinking that if it only harms the tall fescue but kills that poa triv that would be great. Or, for a cool season lawn, is certainty essentially the same as glyphosate as it will kill all fescue, rye and blue grass?
For the poa trivialis there is not a good method to get rid of this weed other than to spot treat with a non selective product like Rounup QuikPRO and over seed in those areas, or you can use a pre-emergent like Prodiamine 65 WDG in the fall to prevent the poa from growing in the first place. Certainty Herbicide is a selective herbicide with the active ingredient of Sulfosulfuron, which is not the same as a non selecetive Glyphosate product.
Answer last updated on: 08/15/2018
