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Tenacity Herbicide

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Tenacity Herbicide by Syngenta is designed as a pre-emergent and post-emergent herbicide for the selective contact and residual control of listed weeds in ornamental turfgrasses. Tenacity may cause temporary whitening of turfgrass foliage; in gerneral, symptoms appear five to seven days after application and may last for several weeks.

Target Pests

Tenacity Herbicide is used for the control of barnyardgrass bentgrass bluegrass buttercup carpetweed chickweed clover crabgrass curly dock dandelion florida betony florida pursley foxtail galinsoga goosegrass ground ivy healall henbit lambsquarters lawn burweed lovegrass yellow nutsedge pigweed purslane sheperd's purse smartweed speedwell sowthistle thistle wild carrot wild violet and many other listed weeds.

For Use In

Tenacity Herbicide is for use on turfgrass species listed on the above label in commercial and residential sites such as golf courses sod farms athletic fields parks residential and commercial properties cemeteries airports and lawns. Do not use on golf course putting greens maintain a 5 foot buffer from the greens.

Application

Rates of pre-emergent application with Tenacity Herbicide vary drastically depending on the species of turf grass from 4 to 8 ounces per acre per application in at least 30 gallons of water prior to weed seed germination. Do not exceed 4 ounces per acre for use on St. Augustinegrass.

For post-emergent application with Tenacity Herbicide use at a rate of 4 to 8 ounces per acre in at least 30 gallons of water per acre adding in a non-ionic surfactant; a repeat application at 2 to 3 weeks may be required for more adequate weed control.

For spot treatments using Tenacity Herbicide mix at a rate of 1 teaspoon to 1 teaspoon of a non-ionic surfactant in at least 2 gallons of water. Apply at 1 gallon per 1,000 square feet.

Coverage Area

If used at the maximum rate of application per acre to St. Augustinegrass each 8 ounce container will treat an estimated 2 acres.

Time to Kill

Tenacity Herbicide begins killing weeds withing minutes after application but can take up to several weeks to get complete control depending on the target weed.

Mix Rate

Mix 1/3 ounce of Tenacity herbicide in 1 gallon of water for spot treatments.

Active Ingredient

Mesotrione 40.0%

Tenacity Herbicide

$65.99
$65.99

Product Q & A

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Browse 13 questions Browse 13 questions and 13 answers
Will this kill yellow foxtail?
If no, what will?
Cal P on Sep 5, 2017
BEST ANSWER: Yes, Tenacity is labeled to control Foxtail. I would recommend using a pre-emergent in the spring and fall months as an added layer to the perfect weed free lawn. https://www.solutionsstores.com/lawn-and-turf/grassy-weeds-control/foxtail-control
My climate (Eastern Washington) still has days over 90F. Is it appropriate to apply Tenacity to my lawn for Bentgrass control under these hot conditions?
Richard C on Aug 21, 2017
BEST ANSWER: Yes, it will be fine to apply to your lawn, just insure that the grass you apply Tenacity to is not stressed or diseased.
I have crabgrass nutgrass foxtail in Bluegrass lawn can I use tenacity?
Waylon on Jul 17, 2017
BEST ANSWER: Yes this will be safe to apply to the Kentucky Bluegrass and will eliminate the crabgrass, foxtail, nutsedge, and many other weeds.
How soon after applying tenacity can the lawn be mowed?
Hawkeye on Jun 22, 2017
BEST ANSWER: You will want to wait at least a week after application before you mow, the longer you can wait the better.
What is the lowest temperature one can spray tenacity and still get it to kill? It's 50 degrees right now where I'm at.
CK on May 24, 2017
BEST ANSWER: You want the weeds and plants to be actively growing, transpiring. Typically, things are greening up, starting to grow, what state are you located in?

Tenacity� is a systemic preemergence and postemergence herbicide for the selective contact and residual control
of weeds in turfgrasses. When applied preemergence, weeds absorb Tenacity during emergence from the soil. Dry
conditions following application may reduce the preemergence activity. If rainfall (0.15 inches) has not occurred
within 10 days after a preemergence application, activate with 0.15 inches of irrigation. When used postemergence,
susceptible weeds absorb Tenacity through foliar contact and soil absorption. 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.
Does tenacity need to be watered in?
Steve on May 10, 2017
BEST ANSWER: No it will not be necessary to water in the chemical after applying it. The product is already mixed with water for the application.
Is this safe for St. Augustine? I have goose grass and global sedge.
CG on May 4, 2017
BEST ANSWER: Yes this product can be used on St. Augustine lawn the product can be applied at a rate of 4fl oz / Acre.
Can this be used in spring before over seeding tall fescue?
HC on Dec 30, 2016
BEST ANSWER: New Seedings/New Lawn Establishment � Apply Tenacity at 5-8 fl. oz. per acre in at least 30 gallons of water per
acre prior to seeding or post seeding of tolerant turfgrass species listed on this label, except fine fescue. Tenacity
may reduce density of fine fescue seedings. Tenacity can be used on grass seed blends that contain less than 20%
by weight of hard or fine fescue. Tenacity will control many monocot and dicot weeds that compete with and slow
the establishment of the turfgrass stands. Apply at grass seeding or close to seeding for best performance. Avoid
spraying on newly germinated turfgrass plants. Wait until the newly germinated turf has been mowed two times or
four weeks after emergence (whichever is longer) before making a postemergence application
How long after treatment can children begin using the turf again?
David on Nov 24, 2016
BEST ANSWER: You want it to completely dry, so I would recommend about 4 hours to keep pets and children out of the area.
How long after sewing tall fescue can Tenacity by applied?
HC on Sep 28, 2016
BEST ANSWER: Apply Tenacity at 5-8 fluid ounces per acre in at least 30 gallons of water per acre prior to seeding or post seeding of tolerant turfgrass species listed on this label, except fine fescue. Wait until the grass seeding has been mowed two times or four weeks after emergence (whichever is longer) before making a postemergence application.
How long after using this chemical can I seed using a tall fescue?
Laura on Aug 21, 2016
BEST ANSWER: You cannot reseed with Fescue after Tenacity is applied, because it is a pre-emergent. Would need to wait an entire season.

Tenacity� is a systemic preemergence and postemergence herbicide for the selective contact and residual control
of weeds in turfgrasses. When applied preemergence, weeds absorb Tenacity during emergence from the soil. Dry
conditions following application may reduce the preemergence activity. If rainfall (0.15 inches) has not occurred
within 10 days after a preemergence application, activate with 0.15 inches of irrigation. When used postemergence,
susceptible weeds absorb Tenacity through foliar contact and soil absorption. 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.
at what temperature can Tenacity be applied?
Paul on Aug 12, 2016
BEST ANSWER: Tenacity should not be applied when the temperature is over 90 Degrees and there is a chance of rainfall.
How much to kill 200 sf
Deb on Aug 10, 2016
BEST ANSWER: http://archive.lib.msu.edu/tic/holen/article/2012may14.pdf great piece of information on Tenacity application.
0.2 ounces per gallon per 1,000 square feet of application.

http://www.epestsolutions.com/psd/tenacity%20label.pdf copy of the label

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Controls windmill grass
Purchased for control of windmill grass in a buffalo grass lawn. I am using Tenacity and Dimension for pre-emergent control. Each product has specific weeds not controlled by the other.With a lot infested with windmill grass adjacent to my yard I was losing the battle. Cursing the day that DSMA and MSMA were banned, as they were good controls for windmill grass. My only choices were a hoe or glyphosate, both destructive to any lawn.Tenacity was made available for homeowner use in early 2012. Since then, my lawn is repairing from the use of glyphosate, and the windmill grass is being held in check. Tenacity does a good job on it. But it does not perform as well with broadleaf weeds as hoped. Post-emergence control of crabgrass is excellent. The part amazing is watching the plants turn white from a lack of chlorophyll. My only complaints about Tenacity are the cost and the limited availability, the latter is the result of local retailers refusing to carry the product. The cost is about the same as Dimension, so I can't complain too much.
June 3, 2013

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