Had a problem with Nutsedge in a 2 month new Flame Fescue lawn. The Nutsedge was everywhere! I'm thinking it came with the topsoil that was installed prior to seeding. After my lawn service applied a general 2-4D herbicide, there was ZERO impact upon the Nutsedge... So I took matters into my own hands. First I tried Q4 (as recommended by a friend who owns a sod farm). I hand sprayed my lawn with a small 2 gallon pump sprayer (about 2/3 acre) using the Q4 at a solution of 1.5 oz per gallon), and noticed some of the nutsedge looking weaker, but some looked untouched and heathly. The Q4 instructions were to apply a 2nd treatment after 2 weeks. Unfortunately, I had used up the Q4 supply. Due to the less than stellar results from the first Q4 treatment (IMO), I spent some more time researcing the best selective turf safe herbicide for Nutsedge, and my conclusion was Sulfentrazone. So when purchasing additional herbicide I noted the Q4 contained 0.69% Sulfentrazone, where as the Solitare contained 1.6%. And I jumped ship for the Solitare product. I used 2 oz per gallon of water for the Solitare applications... but as you can see I received almost 3x the active ingredient when using the Solitare product (vs 1.5 oz of Q4 earlier). So I applied the 2nd treatment using the Solitare, and after 10 days the Nutsedge was HISTORY! I'm sure there will be some more to combat, because I noticed many of the weeds had gone to seed. BUT I'm very confident the Solitare will take quick care of it. The only other ingredient in Solitare is Quinclorac and it is also present in the Q4 product (along with some others), but I'm not certain what weed battle the Quinclorac will win. All in all... I'm Very happy! Only comment for both the Q4 and Solitare makers would be for easier delusion instructions. It was very difficult to identify how much product to use when treating with a hand pump sprayer unit. I was looking for a simple "ounces of product per gallon of water" BTW - I am certain the Q4 application helped with some of the other weeds in the new lawn. And to be honest, I really have no idea if a 2nd application of the Q4 would have taken out the Nutsedge. It may have, or maybe not. As the lawn sits right now, it appears weed free, and that was my goal.
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