Syngenta - Tenacity Herbicide
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Syngenta - Tenacity Herbicide


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Available for Sale in IA, IL, IN, KS, MI, MN, MO, ND, NE, SD, WIRestrictions may apply. Questions? Call (800) 785-3301.
  • Provides post-emergent control of tough-to-control weeds
  • Controls weeds at seeding reducing weed competition
  • Prevents and controls crabgrass pre or post up to four tillers
  • Eliminates weeds at seeding so new grass can flourish

Product Label Download SDS

Change the Way You Control Weeds with Tenacity Herbicide

Kill nuisance weeds in your lawn quickly and efficiently with Tenacity Herbicide from Syngenta. You can tackle more than 46 broadleaf weed and grass species without harming your landscaping and properties!

Tenacity Weed Killer Works for Pre- and Post-Emergence Control of Over 46 Broadleaf Weeds

Syngenta changes the way you control weeds.

You can transform weed-invested lawns into picture-perfect landscaping with one singular product: Tenacity Herbicide. No more seeding first, then spraying later. It’s never been easier to kill weeds and prevent future germination while getting the best of pre-and post-emergent control.

This herbicide is responsible for destroying unwanted plants and vegetation with chemicals that do an excellent job of killing and prevent stubborn weeds. Rest assured, Syngenta Tenacity will not cause further damage or harm to the rest of your property, making it a must-have product to add to your landscaping chemical supply.

Where to use Tenacity

Use Sites:

  • Golf Courses
  • Commercial and Residential Sites:
  • Athletic Fields
  • Sod Farms
  • See label for complete list

How to Use Tenacity Herbicide
Tenacity herbicide works in both pre-emergent and post-emergent applications. It’s helpful to distinguish between the two main types of weed control since they do differ slightly in terms of their purpose; one designated for killing unwanted weeds before they sprout; the other to kill those that have already grown.

  • Pre-Emergent Herbicides- Pre-emergent weed control allows you to prevent weeds from sprouting and popping up from underneath the ground. Since Syngenta Tenacity acts as a pre-emergent herbicide, it will kill weeds before the seed sprouts as temperatures begin to warm, usually in early spring.
  • Post-Emergent Herbicides- Post-emergent herbicides kill weeds that have already sprouted.  Because Tenacity herbicide acts as post-emergent weed control, it will ensure that pesky plants will not spread and invade the rest of your grass. It’s best to use a post-emergent anytime between the spring and fall months.

Syngenta’s Tenacity herbicide label gives landscapers and contractors the best of both worlds. You can get tough-to-control weeds under control while eliminating weeds at seeding so new grass can flourish and grow.

Tenacity’s Active Feature Ingredient

Tenacity herbicide uses mesotrione as its active ingredient.

Mesotrione is based on a naturally occurring compound produced by a bottlebrush plant known as Callistemon citrinus. This bottlebrush plant inhibits photosynthesis in susceptible plant species. The mesotrione is absorbed by plants through the roots, shoots, and leaves and then distributed through the plant by xylem and phloem translocation. This process hinders and restricts the primary plant function, thus keeping unwanted weed and grass species from growing and ultimately resulting in the death of the plant.

Tenacity is a systemic herbicide based on its mode of action explained above. A systemic herbicide is absorbed and moved through the plant’s system— the main goal being to kill the entire plant from the inside out. Contrastingly, contact herbicides only kill the part of the plan that the herbicide comes in contact with.

Weed and Grass Species Affected by Tenacity Herbicide
Control troublesome weeds in their most important phase of seed germination and establishment throughout the entire year. The list of weeds controlled include:

  • Chickweed
  • Crabgrass
  • Clover
  • Dandelion
  • Creeping Charlie
  • Thistle
  • Wild Violet
  • See label for an exhaustive list

Tenacity is the only herbicide to selectively controls over 46 broadleaf and grass species! Because Tenacity is a selective herbicide, it will not kill all lawn types, but more so concentrate on the specific weed and grass list briefly listed above. Surrounding grass will not be affected, unlike non-selection herbicides.

Tenacity Application
You can achieve the best weed control in typically two applications in three-week intervals. Simply spray on the lawn or property in pre-emergent and post-emergent applications. The 8 oz bottle of Tenacity weed killer includes a syringe for spot treatments.

Upon spraying the Tenacity, you and the homeowner will notice a white appearance on the lawn. Not to worry— the white weeds that appear after your Tenacity herbicide application lets homeowners know that the weed treatment is working! White grass tips are typically mowed off with subsequent mowing; however, some turfgrasses may experience bleaching.

What’s more, mesotrione, the weed killer’s active ingredient, has been granted reduced-risk status for turf applications by the EP.

Please note that Syngenta Tenacity should not be applied through any type of irrigation system, nor should it be applied on any golf courses or putting greens and maintain a 5' buffer between treated areas and putting greens. You should not be applying Tenacity on turfgrasses sensitive to this herbicide application like bentgrass or Poa annua.

Discover More from Syngenta

Globally, Syngenta is a leading agriculture company striving to improve the way farmers use available resources. With their collaborative and trusted team, they are changing the agriculture industry for the better— enhancing seed and crop protection and enabling food resources to feed the world safely.

Syngenta’s Turf & Landscape sector plays to the same strengths of seed and crop protection but uses it to develop innovative solutions for turf care. With a breadth of coverage and proven performance from their product portfolio, Syngenta Crop Protection works hard and works well when it comes to protecting turf, no matter the species or season.

Shop More Herbicides at Reinders

Your turf and landscaping needs are covered with our large selection of herbicides from leading brands in the industry.
You can determine your needs and make the best choice with Reinders’s selection of products, from pre-emergent weed killers to post-emergent herbicides.

Looking for other reliable chemicals? We’ve got you covered on all fronts.

Give your lawn, field, or garden some extra attention and care to get them looking their best. By taking the guesswork out of properly treating your green spaces, you (and your clients) will be satisfied with the professional results of the top turf and lawn care chemicals found right here on Reinders.com

The Reinders Difference

Reinders, Inc. is a family-owned, regional distribution company that carries professional-grade products and supplies for the green industry.

At Reinders, we pride ourselves on having the best selection of reliable products that help you thrive in your business and the unrivaled customer experience that goes along with it.

Our local knowledge of national product lines makes us willing and able to help you find the best match for your project needs. Regardless of if you specialize in residential, commercial, municipal, agricultural, or public-sector application types, we’re here for you.

We stand by our depth of vendors that make a wide selection of products available to you to prepare for every season. We’ve even got the knowledge and expertise on each and every product that sets us apart from the rest.

Our team of industry experts understands your daily challenges, and we are here to provide solutions to all of your needs. Quality products aren’t enough— you get the unparalleled customer service our second-to-none staff provides.  

Whether that starts with Tenacity herbicide or another one of our turf and landscaping products, we’re here to help you achieve beautiful landscaping and prosperous businesses.

For product recommendations, herbicide application tips, or to answer any other related inquiry, contact us today!