If you don’t water it in you’re essentially using it as a post-emergent. Hit mature crabgrass once with Tenacity or Drive XLR8, and you set it back some but it recovers. The obvious thing: hit it again. Maybe one or two companies using tenacity for weed control and crab. The need for repeat applications of Tenacity is very clearly discussed both on the label and in literature. The Syngenta Tenacity Turf Herbicide is another great crabgrass killer that I tried. So pretty much you spray your mix onto the weeds and the weeds absorb the control through the leaves and root system. Tenacity is one of the best systemic herbicides on the market today. It removes broadleaf weeds such as clover, dandelion, and chickweed. It’s a systemic herbicide which doesn’t mean much to you I know. There is a 40% mesotroine in this formula which makes it perfect for the tenacity lawn. It can be used to remove crabgrass, nimbleweed, bentgrass and other difficult to control weeds. It needs to reach the soil to work as a pre-emergent. It looks horrendous and worst of all it doesn't even look like its even killing the crab. Tenacity pre-emergent Re: Tenacity and crabgrass Post by cityofoaks » Sun Oct 04, 2020 11:59 pm The preemergent if gotten out on on time at the correct rate should leave you with very little crabgrass you actually have to spray out. Move along. Tenacity Weed Killer Overview. The tenacity weed control was an amazing choice and if it weren’t for the former, I would think this is the best. But again I'm not sure how it interacts with centipede. Tenacity weed killer can be used as a pre-emergent herbicide or as a post-emergent program control. Its formulation contains 40% mesotrione, which is in the grade of commercial weed killers and is capable of controlling broadleaf and grassy weeds in the lawn before and after emerging. I'm also not sure how the pre-m part of tenacity will stunt the bermuda from coming up. Tenacity can be applied to existing weeds at seeding and provide residual control to continue keeping lawns and turfs looking good. The benefit of this is the herbicide affects the full cycle of the weed’s life, making it an effective solution for killing of crabgrass completely. Tenacity herbicide can be used for pre- and post-emergence control of more than 46 broadleaf weed and grass species. What to do? Its active ingredient, mesotrione, is based on a naturally occurring compound produced by the bottlebrush plant (Callistemon citrinus) that … Tenacity Turf Herbicide will kill grassy weeds and won’t kill lawn grass. Tenacity’s herbicide actually includes a formula that starts affecting the weeds while they’re still in the ground. However, this grass is simply the best for Turf Grass. Tenacity herbicide will allow lawns to look well from the beginning. Hit a dandelion once with 2,4-D, and it's done. 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