Tenacity Herbicide is only safe to use on Kentucky Bluegrass, Centipedegrass, Buffalograss, Tall Fescue, Perennial Ryegrass, Fine Fescue, St. Augustine Grass (grown for sod only). Applications to other turfgrasses may result in injury or killing the desired turfgrass.
Please view the product label for more information.
No, Tenacity is not labeled to treat black medic or quackgrass per the product label. The common recommendation is to kill the quackgrass with a glyphosate product like Roundup QuikPRO and then reseed after 2 weeks.
For Black Medic, if you have cool season turf then we would recommend Hi-Yield Triclopyr Ester, if you have a warm season grass then we would recommend a product such as Surge Broadleaf Herbicide.
Please be sure to review the product labels for your turfgrass and mix rates.
Tenacity Herbicide is only labeled as a post emergent for nutsedge and does not offer any pre emergent qualities for yellow nutsedge. Also, Tenacity can only be safely applied when bermudagrass is fully dormant in late fall and winter and should not be applied in spring or summer to bermudagrass. Unfortunately, there is not a pre emergent labeled for nutsedge and is best controlled using a post emergent when it is first emerging to get control of it.
Dismiss Turf is labeled for yellow and purple nutsedge, kyllinga and many other harder to kill weeds in bermudagrass at the rate of 0.18 - 0.275 fl oz per 1000 sq ft. Please view the full product label for more information.
The product label advises on waiting 7 days after applying Tenacity Herbicide if you will be applying an organophosphate or carbamate insecticide as it could cause potential injury to the turf. Other insecticides not in either of those classes would be fine to apply 24 hours after the application of Tenacity.
For example, Bayer's Dylox 6.2 Granules or Dylox 420 SL both have an active ingredient of Trichlorfon which is considered an organophosphate, therefore you should wait the window of at least 7 days before you apply Dylox 6.2 or Dylox 420 SL to the area that has been treated with Tenacity Herbicide. Other examples of organophosphate or carbamate insectides contain Malathion, Parathion, Diazinon, Fenthion, Dichlorvos, Chlorpyrifos, & Ethion.
Unfortunately, we do not carry a product that will help control crabgrass and broadleaf weeds such as creeping charlie (aka ground ivy) without also injuring the desired clover. We would only recommend spot treating the weeds with a non-selective like Roundup QuickPro and then reseeding after 2 weeks.
You can also check with your local department of agriculture or county extension office for a product you can use that could be selective.
Tenacity Herbicide is applied at 1 tsp of product + 3 tsp Non Ionic Surfactant in 2 gallons of water with using 1 gal of mixed solution per 1000 sq ft of area.
* A Non Ionic Surfactant is required for post emergent applications for the listed weeds controlled. If applying Tenacity for pre emergent control of listed weeds, a Non Ionic Surfactant is not required.
Please view the full list of weeds controlled either as a pre or post emergent on page 9 of the product label.
Tenacity Herbicide should only be applied to established listed lawns as directed on the product label. You should avoid vegetables, flowers, groundcovers (junipers), trees etc
Bonide Grass Beater Over-The-Top Grass Killer Concentrate is an alternative option that's labeled safe around a variety of junipers and labeled to help control/suppress grassy weeds like crabgrass and bermuda etc.
When applying Tenacity Herbicide, water acts as the carrier to distribute the active ingredient evenly and thoroughly over the lawn. get the herbicide into the soil. Be sure you are using enough water volume to cover each 1000 sq ft area. This can be applied the day or close to seeding as possible. If rainfall has not occured within 10 days of the intitial application, it is recommended to water the lawn with 0.15 inches of irrigation.
Please view the full product label for more information.
Tenacity Herbicide can certainly damage your turf if overapplied. Although we cannot predict the outcome of your lawn application, we are hopeful that the damage sustained will be minimal.
For further details on the affects of overtreating on your lawn, please contact Syngenta at 866-796-4368.
Regarding tank mixtures of various herbicides, including Tenacity Herbicide and SedgeHammer Herbicide, all product labels should be referred to for mixing restrictions, while always adhering to the most restrictive label. If tank mixtures are not prohibited, it is then advisable to make a small jar test for compatibility purposes, before mixing a full tank.
We have not heard of the dye indicator not being visible when mixed per the product label instructions. Please contact us directly at 866-581-7378 to further discuss depending on the dye indicator used and the dye indicator ratio to water volume used.
Since water is acting as the carrier to get the Tenacity Herbicide into the soil, you cannot use "too much" water when applying. Typiclally, one gallon of water should be used to thoroughly cover a 1,000 sq ft area so if treating a 1/4 acre you will use 11 gallons of water total. If making 2 passes to distribute the 1.5 ounces, you can use at least 5-6 gallons of water each pass.
There should be no issues applying Tenacity around the same time as a feritlizer or reseeding. When reseeding the Tenacity product label suggests apply seed at the time of application or as close to it as you can.
Check the product label for the fertilizer you are using to make sure it doesn't state that it cannot be used with herbicides.
Sensitive means that certain turfgrasses or conditions can result in injury when applying even selective herbcides such as Tenacity Herbicide. It will not kill the weed, grass or plant completely but you may see some browning, wilting or discoloration for a short period of time before it recovers.
You will need to wait until the new grass has germinated and is well-established before applying Tenacity or other post-emergent herbicides. Turfgrass is generally considered established after the second mowing.
Yes, it will sometimes take 3 applications of Tenacity Herbicide to fully start eradicating the nimblewill. Make sure you are using 1 tsp of Tenacity with 2 tsp of surfactant to 1 gallon of water as this is needed for best results.
Please view the product label for more information.
Tenacity is labeled for post emergent control only of creeping charlie (ground ivy), it does not control ground ivy for pre emergent applications. When using Tenacity for post emergent applications, a non ionic surfactant should be used in a tank mix for best results.
Please review the product label for your turfgrass type and application rates.
Post emergent applications are most effective if applied when weeds are young and actively growing. View our Creeping Charlie (Ground Ivy) Treatment Guide for more information.
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Yes, you can use another pre-emergent with Tenacity Herbicide if you need to for additional or longer weed prevention. Keep in mind that other pre-emergent herbicides cannot be applied before seeding, though. We have more tips in our Crabgrass Prevention Guide here.
Tenacity is not labeled to treat sweet grass.
You can use a non selective such as Drexel Imitator Aquatic Herbicide to treat for sweetgrass and then reseed any barespots.
Please view this article HERE for other information on how to treat this weed.
The whitening process that occurs after applying Tenacity can take anywhere from a few days up to about 3 weeks. Timing of complete death of weeds can vary depending on the type of weeds, the height and root system, soil temps, weather and temperatures in the region. The foliage of treated weeds cease growth after the application and then the loss of chlorophyll that causes the whitening will begin with death occuring typically after 3 weeks. The product label does advises that a repeat application is required after two to three weeks for improved postemergence weed control.
Review the Weeds Controlled starting on page 8 of the product label to verify the weeds you are targeting as listed for Post Emergent Control with Tenacity and that a Non Ionic Surfactant is tank mixed for the application.
Tenacity when applied for pre emergent applications in early spring and late fall to help prevent weeds from germinating and would not require the use of a Non Ionic Surfactant and the whitening process does not occur with pre emergent applications.
