Tenacity Herbicide - Questions & Answers

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  • Asked by Jim from Northern Virginia
    04/13/2015
    Q
    I have what a landscape person called Rough Stalk Bluegrass, a Canadian Hybrid or Poa Trivilais.
    There are patches in my yard that have a bright greenish color. It really stands out. Will Tenacity take care of this.
    A
     Tenacity Herbicide is labeled to take care of this. Be sure to mix a surfactant like Non Ionic surfactant to help promote the product to stick.  
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    3 of 5 people found this answer helpful.
  • Asked by Jeffrey from Trumbull
    05/10/2015
    Q
    Will Tenacity damage Poa trivialis lawngrass?
    I have Poa Triv in shady areas and need to get rid of invasive creeping bent in my lawn.
    A
    The product label for Tenacity does not specify whether it would harm poa trivialis. Both bentgrass and poa annua may be sensitive to Tenacity, while Kentucky Bluegrass is listed as tolerant. Certainty Herbicide is labeled to control poa trivialis, but we are not certain if it would harm the bentgrass. The best option for you is to spot treat the rough bluegrass with RoundUp QuickPro and then reseed with the desirable turfgrass.
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    3 of 6 people found this answer helpful.
  • Asked by Mike from Rockford, Il
    04/28/2016
    Q
    How soon after a pre-emergent appication of Tenacity can I apply a post-emergent spray of Tenacity?
    A

    After further information from the manufacturer they have verified that to making a pre-remergent application with Tenacity you will need to apply a post emergent application once you detect germination of the weed itself. Syngenta recommends to apply no more than 3 application per year. 

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    3 of 3 people found this answer helpful.
  • Asked by John from Clifton Park, Ny
    05/03/2016
    Q
    Is Tenacity Herbicide organic?
    A

    No, Tenacity Herbicide is not organic.

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    3 of 3 people found this answer helpful.
  • Asked by Julie
    05/05/2016
    Q
    Does a long storage time reduce the efficiency of Tenacity?
    Tenacity worked wonderfully on my lawn when I first got it but I have stored it for approx. 3 years and the stored product does not seem to be working at all to kill weeds. I stirred it thoroughly before adding to water in sprayer. I used the recommended 1/2 tsp. per gal. of water.
    A

    Tenacity Herbicide if stored in a cool dry area will last up to 3 years. It sounds like you need to purchase fresh product. The mix rate you are using is correct.

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    3 of 5 people found this answer helpful.
  • Asked by James from Indian Trail, Nc
    10/26/2016
    Q
    Can I now do my second round of Tenacity Herbicide on new grass?
    I got one round of tenacity on my lawn then i aerated & reseeded 3 weeks ago. I fixed some large bare spots as well. I have new grass growing, but I see more weeds and clover and Crabgrass coming back. Can I now do my second round of Tenacity on this new grass. I'm starting the win the battle looks like, but Crabgrass is still hanging in there on about 30 % of total lawn.
    A

    If you have already seeded, then you do not want to apply Tenacity Herbicide to the newly seeded turf until is has been mowed two times or four weeks after emergence (whichever is longer) before making a postemergence application.

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    3 of 3 people found this answer helpful.
  • Asked by Rod from La Habra Ca
    10/30/2016
    Q
    If I only used 1 tsp of Tenacity Herbicide per gallon of water and not in 2 gallons of water, should I repeat application or go ahead and reseed the area?
    I purchased a bottle of tenacity from you a few months back. I recently treated areas of tall fescue that have turned ghost white (whitening was expected) a week + later I realized I messed up and mixed only 1 gallon per tsp/1000 sq feet + nis . The label calls for 2 gallons of water per tsp. Please let me know if you have any feedback of whether I should wait it out or prepare to reseed the affected areas? Thanks
    A

    Since Tenacity is an effective herbicide for weed control prior to or during seeding of certain turfgrasses during turf renovation and the water is only acting as the carrier for the solution to get into the weeds, you should be ok to reseed if you are happy with the results. For post emergent applications, you will need to wait for the turf to be established after 2 mowings to reapply.  

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    3 of 5 people found this answer helpful.
  • Asked by Chris from Connersville, Indiana
    03/12/2017
    Q
    What will kill nimbleweed in my bluegrass/fescue lawn?
    A

    Tenacity Herbicide would be a great product to use to treat for nimbleweed and can safely be used in fescue and other cool season grasses.

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    3 of 4 people found this answer helpful.
  • Asked by Terry from Islip Terrace, Ny
    05/01/2017
    Q
    Will Tenacity kill lawn fungus?
    A

    Tenacity Herbicide will not kill lawn fungus. It is a herbicide that will only eradicate listed weeds in listed turfgrass only. We do offer fungicides for the lawn. 

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    3 of 5 people found this answer helpful.
  • Asked by Domenic from North Royalton, Oh
    06/27/2017
    Q
    What is the ratio of Tenacity for established Kentucky blue and ryegrass lawn?
    I have a well established lawn comprised of mostly ryegrass and Kentucky blue that is slowly succumbing to spreading bent grass. I am struggling to confirm ratio of Tenactiy to surfactant to water for proper post emergent application. Can you please provide a ratio based on tank mixing 30 gallons at a time?
    A

    The amount of Tenacity Herbicide that is used is based on the amount of area you are treating. With herbicides, the amount of water is not as important as the amount of water that is being used. The rate we would recommend using is 5 fl oz to cover an acre. This can be mixed in 25-30 gallons of water to cover an acre.

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    3 of 4 people found this answer helpful.
  • Asked by Annette
    07/03/2017
    Q
    What can you put in the mixture of Tenacity Herbicide to turn the plant color until it dies?
    A

    We are not aware of anything that can be added to Tenacity Herbicide to cause the plant color to change as it dies and it already causes a color change itself.  Per the product label: Foliage of treated weeds cease growth after application, then turn white (loss of chlorophyll) and death may take up to three weeks. A repeat application is required after two to three weeks for improved postemergence weed control. A non-ionic surfactant should be added in postemergence applications

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    3 of 4 people found this answer helpful.
  • Asked by Charles from Metropolis, Il
    08/26/2017
    Q
    What do you mean "after a post emergent application" when referring to watering after using Tenacity Herbicide?
    A

    Tenacity Herbicide can be used as a pre-emergent or a post-emergent. A post-emergent application on Tenacity Herbicide would be to kill weeds that are already there. The product does not need to be watered in after application. For a pre-emergent application, the product is used to prevent weeds from coming up. It is recommended that you water the product in 1/2 inch after application to get the product into the soil. 

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    3 of 3 people found this answer helpful.
  • Asked by Jess from Greenwood, In
    09/26/2017
    Q
    Do I need to wait for the last application to reseed after using Tenacity Herbicide?
    I am applying my first round of tenacity and plan on reseeding. I anticipate I will need a re-application in 2-3wks per bottle instructions. Do I need to wait until my finial application to reseed as the label says to wait two mows or 4wks before applying to newly germinated seeds?
    A

    Per the label of Tenacity Herbicide, this product can be applied at the same time of seed, except fine fescue. It is recommended that you mow at least two days before and/or two days after.

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    3 of 5 people found this answer helpful.
  • Asked by Ceasar from Splendora, Tx
    02/01/2018
    Q
    How many times per year can I spot treat using Tenacity?
    A

    There is not a specific limit on the number of spot treatments that you can make using Tenacity Herbicide as long as you do not exceed the annual maximum of 16 oz Tenacity per Acre or per crop. Typically you would wait at least 2-3 weeks between applications to the same areas. Be sure that you follow all the product label instructions as far as timing with seeding and other restrictions.

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    3 of 5 people found this answer helpful.
  • Asked by Keith from Tampa, Fl
    02/12/2018
    Q
    Can I broadcast spray my entire St. Augustine lawn with Tenacity Herbicide or should I only spot-treat?
    A

    Tenacity Herbicide is labeled for use on St. Augustine grass that is grown for sod only, not for use on residential St. Augustine lawns. Hi-Yield Atrazine Weed Killer is a pre- and post-emergent herbicide that can be used on St. Augustine lawns for a wide variety of weeds. 

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    3 of 8 people found this answer helpful.
  • Asked by John from Pulaski
    05/22/2018
    Q
    Can you mix insecticide with Tenacity?
    A

    It is not recommended to mix certain insecticides with Tenacity Herbicide.  You should wait to apply organophosphate or carbamate insecticides 7 days after treating with Tenacity Herbicide to avoid potential turf injury. Other active ingredients would be fine to use at the same time.

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    3 of 3 people found this answer helpful.
  • Asked by David from Kalamazoo
    07/14/2018
    Q
    Due to excess heat and draught my bent grass is dormant (brown). Can I use Tenacity now or should I wait.
    A

    Tenacity Herbicide is labeled to control bentgrass but it does need to be applied when it is actively growing and healthy.  Per the product label: Apply Tenacity at 5 fl. oz. per acre in at least 30 gallons of water per acre at two to three week interval for up to three applications. Apply with a NIS surfactant. Bentgrass control may be more effective in the late summer/early fall just prior to onset of renewed bentgrass growth, than spring/early summer applications

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    3 of 3 people found this answer helpful.
  • Asked by Mark from Shelbyville, Ky
    08/11/2018
    Q
    What do you recommend to combat the wild violet and nimblewill taking over my yard?
    The desired grasses in the yard are bluegrass and fescue. Will I get effective control applying at this time of the growing season? Recognizing they are very different weeds, can the recommended products be mixed into one application? Or, should they be separate applications and, if so, how far apart?
    A

    Tenacity Herbicide can be used for both nimblewill and wild violet.  To control nimblewill, you should start applying Tenacity Herbicide in the spring (late-April). You may need to make two or three applications to get complete control.  You can also apply Tenacity in late summer and fall, but you should initiate treatments by August for best results. For other weeds such as wild violet apply to young, actively growing weeds.

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    3 of 3 people found this answer helpful.
  • Asked by James from Ogallala
    08/19/2018
    Q
    How long does Tenacity need to be on the weeds before rainfall for maximum effectiveness?
    A

    For best results, do not apply Tenacity Herbicide when rainfall is forecasted to occur within 48 hours.

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    3 of 4 people found this answer helpful.
  • Asked by Mina from Baytown, Tx
    08/31/2018
    Q
    The Tenacity label says that it can be used for St. Augustine grass "grown for sod only." What does this mean?
    A

    Tenacity Herbicide should only be used on St. Augustine grass that is grown on sod farms.  It cannot be used on St. Augustine in residential lawns. 

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    3 of 19 people found this answer helpful.
Displaying 321 to 340 (of 591 questions)