Negate 37WG Herbicide is not labeled for cool season turf therefore would damage your Kentucky Bluegrass.
Since poa annua and cool-season grasses are so closely related, there are few products that will kill the poa annua without also harming the lawn. The only one we are currently aware of is called Prograss which can kill & prevent poa and can be applied at seeding, however, it can only be applied to residential lawns by licensed applicators. You may want to see if a service local to you can provide this chemical treatment to your lawn.
Your only other option would be to spot-treat with a Roundup-type product and then reseed with the desirable grass type in those areas. Using a pre emergent such as Dimension 2EW or Pendulum 2G in the fall and spring when you are not overseeding to help prevent the poa from emerging. Typically a split treatment in the fall will yield to longer and better prevention of the weeds.
Please view our Poa Annua Treatment Guide and our When/How to Apply a Fall Pre Emergent Video that may also help.
Unfortunately, we are not able to confirm with the manufacturer if this mixture rate would still be effective for weed control therefore we would recommend to mix a new mixture of Negate 37WG Herbicide at the proper ratios for best results.
Negate 37WG cannot be used on Fescue or Saint Augustine grass.
If using a handpump or backpack sprayer to apply Negate 37WG Herbicide, it is necessary to mix the entire 1.5 oz bottle into 1 gallon of water to create the correct suspended concentrate of the two active ingredients. You will then take 3 ounces from that gallon of mixed solution and mix that into one gallon of water for spot treatments. The original gallon you mixed the entire bottle into will be good for about a month.
Please refer to page 27 of the product label under Mixing Instructions for more information.
Quali-Pro Negate 37WG is a wettable granular, so it is a solid concentrate that you dilute in water and apply as a spray. It is applied at 1.5 fl oz per acre and spray volumes of 20 to 80 gal/acre and pressures of 25 to 35 psi.
With Negate 37WG, it is necessary to mix the entire contents of the bottle into one gallon of water to create the correct suspended concentrate of the two active ingredients. You will then take 3 ounces from that gallon of mixed solution and mix that into one gallon of water for spot treatments. The original gallon you mixed the entire bottle into will be good for about a month.
Negate 37WG is not labeled to control Dalliisgrass.
For dallisgrass you have a few options really. You use something like Certainty. For this product you would also need to use a surfactant.
Image Kills Nutsedge is another option if treating a smaller lawn. We would recommend applying a pre emergent like Dimension 2EW before the weeds emerge for prevention. It would also be recommeneded to use a pre-emergent before it emerges for prevention.We would not recommend tank mixing Quinclorac and Negate 37WG Herbicide due to the physical compatibilities. Be sure that one application is dry before applying the other.
You should not water after an application of Negate37WG. Per the product label for Negate 37WG: Runoff of this product will be greatly reduced by avoiding applications when rainfall or irrigation is expected to occur within 48 hours
Negate 37WG Herbicide takes about 2 weeks or so to start showing results and for complete kill. It is best applied to young just emerged weeds.
Negate 37WG Herbicide is applied to established Bermuda or Zoysia when the turf is fully dormant or fully greened up (not in transition, going in or out of dormancy) as directed only.
You can reapply Negate 37WG Herbicide as directed after 4 weeks if the target weeds are still present.
Negate 37WG Herbicide is a selective herbicide but it cannot be applied to fescue lawns.
For a 2nd application of Negate 37WG Herbicide, you can reapply after 4 weeks if weed is still present.
We recommend applying Negate 37WG Herbicide to a dry lawn and not water in or expect rain for 24 hours.
Negate 37WG is best applied when temperatures are above 55 degrees and below 85 degrees. Other than that there are no restrictions on application time because this product is a post emergent. You can use whenever you see the weeds in your yard and they are actively growing.
Yes, Negate 37WG is labeled to be used on bermudagrass or zoysiagrass.
Negate 37WG cannot be used on fescue. Since Poa Trivialis and Fescue are both cool season grasses, there is not a selective herbicide that would kill the poa trivialis without also killing the fescue. We suggest spot treating with a non-selective like Roundup and then reseeding after 2 weeks.
Yes, Negate 37WG is labeled safe to use on Bermuda as long as you are following the instructions on the product label. Per the label in reference to bermuda and zoysia, "The effects of NEGATE 37WG on these turfgrasses during transition have not been fully evaluated." You may view more information on page 10 of the product label.
