If Tenacity Herbicide or any herbicide is exposed to extreme freezing or heat temperatures, the concentrate can and would lose efficacy. When stored in cool dry and temperature controlled environments, the shelf life is 3-5 years.
Tenacity Herbicide can be used both in spring and fall for pre emergent control of weeds when soil temps are around 55 degrees. Tenacity is one of the top pre emergents for cool season turfgrasses in fall and can be applied at the same time as overseeding without inferferring with grass seed germiantion.
For post emergent control of actively growing weeds, a Non Ionic Surfactant is required to be added to tank mix. Post emergent applicaitons can be applied anytime the weeds are actively growing. Please refer to the list of Weeds Controlled on the product label for information on pre/post emergent control of targeted weeds.
Tenacity is not usually applied in December since it is most often applied to cool season turfgrasses, and it would be too cold in December to use herbicides in most areas with these turfgrasses. Whether Tenacity will work for your needs will depend on the type of desirable turfgrass you have and what specific weeds you are targeting. Tenacity is not safe to use on St. Augustine, zoysia, or Bermuda grass lawns.
Tenacity is usually applied as a pre-emergent in the fall or spring before overseeding with cool season grass such as rye or fescue. As a post-emergent, you would only spot treat with Tenacity as directed on the product label since this product can cause temporary whitening on desirable turfgrass.
Tenacity Herbicide can be applied as a pre-emergent before or at the same as seeding. We recommend that you only apply Tenacity after seeding if you can make the application within 7 days of seeding. Otherwise, you would need to wait until the new grass has come up and been mowed at least twice.
Tenacity Herbicide can be applied to dormant bermudagrass only without injuring the bermudagrass. However, a better product would be Negate 37WG.
Negate 37WG can be used on dormant or growing turf for listed weeds as directed on the product label.
Tenacity Herbicide is applied at 4 - 8 oz. per 30 gallons of water per acre. This means 1 kit could cover 1-2 acres.
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. We recommend contacting your local cooperative extension office and speak with the master gardener in your area for advice for specific timing in your area.
Tenacity Herbicide is not labeled for perennial peanut also known as "Florida Alfafa". Grass Out Max is labeled for perennial peanut for control of grassy weeds. 2,4-D Amine Herbicide is labeled for this weed around specific crops. Please view the product label here for more information.
We also recommend contacting your local Master Gardener with the Cooperative Extension Office for recommendation proven to be effective in your area.
As you probably know, Centipedegrass is a very sensitive species of turf so many products that eliminate the crabgrass and other weeds can also cause damage to your lawn.
Tenacity is a great pre-and post-emergent herbicide that will control crabgrass along with many other types of weeds and listed safe for centipede lawns. When used for post emergent control of actively growing weeds, a non ionic surfactant is recommended for best results. The surfactant is not needed for pre emergent applications. Turf Mark Blue can be tank mixed to allow you to see where you have treated and to ensure thorough coverage and avoid overlapping.
Review the Tenacity product label and apply as directed to avoid possible injury to your turfgrass. Keep in mind, this is a strong herbicide so any overmixing, overapplying or applying when centipede is transition in or out of dormancy can injure the lawn. Some whitening of the weeds and turfgrass is normal as this is part of the weed killing process, but the color will return in 3-4 weeks at most or after the next 1-2 mowings.
Tenacity Herbicide is not labeled safe to use on bentgrass and per the product label can cause injury.
Please refer to the product label if more information is needed.
Tenacity Herbicide is not labeled to control torpedograss.
Drive XLR8 is labeled for torpedograss in Bermuda grass, Kentucky bluegrass, Buffalo grass, Fescue, Ryegrass, and Zoysiagrass. A Methylated Seed Oil Surfactant is recommended to be used for best results.
Per subnote 3 on page 9 of the Drive XLR8 product label, “Make 2 sequential applications of 1 fl oz per 1000 sq ft and an additional sequential applicaiton up to 0.9 fl oz per 1000 sq ft at 14-21 day intervals.”
Yes, you can apply Tenacity Herbicide to dormant centipede grass. Make sure to read and review the Tenacity product label very carefully and mix exactly what is recommended as this is a strong product and mis-using it can cause temporary turf injury.
When applying Tenacity it is highly recommended to use a temporary turf colorant like Turf Mark Blue to allow you to see where you are spraying. Overlapping your application of Tenacity can cause temporary whitening of the lawn as well, but the color will return in 3-4 weeks at most.
Tenacity Herbicide is labeled to control foxtail both as a pre emergent before weeds germinate and as a post emergent when foxtail is actively growing. For post emergent applications, a non ionic surfactant is needed to be used in the tank mix.
View the full product label for more information.
Tenacity Herbicide is not labeled to control Poa Annua/Annual Bluegrass, it only states that it could cause injury to it if sprayed with tenacity. Since it is not specifically designed to control Poa Annua, a better product choice would be Echelon 4SC. Echelon 4SC is labeled for pre-emergent control of poa annua only.
According to the product label, apply Echelon 4SC Herbicide in August or September to established, non overseeded turf before Poa Annua germinates.
Consult your local Cooperative Extension Service for more specific applications timings for your local area since August and September are approximate timings.
For perennial ryegrass, Tenacity Herbicide is applied at 5 oz per acre in 30 gallons of water. To treat 33 acres, you would need 21 x 8 oz bottles of Tenacity with 990 gallons of water.
Please view the full product label for more information.
Tenacity Herbicide is best applied either 2 weeks before seeding or 2-3 weeks after seeding to prevent injury for Centipede lawns.
Please view the full product label for more information.
Yes, Tenacity Herbicide is labeled to control veronica speedwell. Please refer to the product label for the recommended rates for your specific turfgrass.
If applying Tenacity Herbicide for pre emergent control in late fall or early spring, the timing of the application is important in order to prevent weeds from germinating. For best results, Tenacity should be applied at the same time as overseeding for weed prevention. Results can also depend on the specific weeds you are targeting and if Tenacity is listed to control them as a pre emergent or as a post emergent.
For specific timing recommendations, we like to recommend checking with your County Extension Office for their recommendations as this can vary from region to region.
For a full list of Weeds Controlled by Pre/Post Emergent applications, refer to page 9 on the product label. Remember, for post emergent control of weeds with Tenacity – a non ionic surfactant is needed.
