According to the Safety Data Sheet, before Tenacity Herbicide is diluted, it should have a beige to tan liquid appearance. If the product has been tightly sealed and kept out of sunlight and extreme temperatures, the shelf life is 3-5 years. When using Tenacity, 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 post-emergence applications. Please review the product label for more information about this product and applications.
Yes, you could potentially apply Tenacity Herbicide after using a weed and feed product, but you should wait about 2 weeks between applications so that you do do not put too much stress on the grass at one time.
The Tenacity product label does state that it can be mixed with pre-emergence products to provide season long control. Dimension's product label does also state that it can be. Please refer to both for complete instructions and you may need to perform a compatibility test before treatment.
If you are trying to apply Tenacity Herbicide to control bentgrass, 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."
You can also call our Customer Service staff at 866-581-7378 M-F 9a-5p EST if you have further questions.
Per the Tenacity label, you will not exceed 5 fl. oz. of product per acre for fine fescue. This is just the max amount that should be used per year and per acre. The rate that should be used is you will need to mix 0.5 tsp of Tenacity and 1.5 tsp of surfactant to one gallon of water covering 1,000 sq ft. Also, Tenacity should NOT be applied at the time you are putting down new seeds or overseeding. This will likely inhibit their growth. You will want to wait until the lawn has been established before applying this product for pre-emergent control. This is generally after three mowings. There are no restrictions for Tenacity with regards to post-emergent control of weeds.
Tenacity Herbicide when applied per label will not harm established Centipede. Bermuda can be sensitive to Tenacity.
No, Tenacity Herbicide is not labeled for application to bahia grass.
No, Tenacity Herbicide is not labeled for spurge.
Tenacity Herbicide should be applied at grass seeding or close to seeding for best results. If you are not close, meaning within a week of application, then you would need to wait 6-8 weeks to re-seed.
Per the manufacturer, " Tenacity has been tested in tank mixtures with Barricade 65WG Herbicide (prodiamine), Vanquish® (dicamba), Turflon® ester (triclopyr), Spotlight™ (fluroxypyr), Quicksilver™ (carfentrazone), Basagran® (bentazon), Princep® (simazine), and AAtrex® (atrazine) for safety and efficacy on turfgrasses. Tenacity must be applied at reduced rates (4 fl. oz./A or less) if tank mixed with atrazine, bentazon or simazine. Other tank mixture partners may be safe but have not been tested. Turf managers wanting to tank mix Tenacity with other herbicides should test on a small basis for compatibility, safety and efficacy before treating large areas. See product labels for directions and precautions."
Tenacity Herbicide is only labeled to be applied to dormant bermudagrass, it could harm actively growing bermuda or inhibit seeds from growing. You need to wait at least 18 months to seed the area after an application
Per the product label for Tenacity Herbicide: Do not plant any crop other than turfgrass species for 18 months after the last application of Tenacity or injury may occur.
Tenacity Herbicide can be applied any time before the weeds start to germinate. Weeds absorb Tenacity as they emerge from the soil. For the best time to apply pre-emergents in your county we recommend contacting your local cooperative extension office here. Crabgrass seeds will start to germinate when soil temperature are around 55 degrees, so you need to apply it before you have those temperatures for best results.
Tenacity Herbicide is our most popular product for eliminating bentgrass from other desirable turfgrasses, but it does typically require multiple applications. Late summer/Fall applications will be more effective than Spring applications. If you are able to spot treat with RoundUp QuikPro, that is another option. It would still be ideal to wait at least 10-14 days after applying the Roundup QuikPro before raking out the dead plants and re-seeding those areas.
You can reapply Tenacity Herbicide after 2-3 weeks for post emergence control of actively growing weeds for best results. There should not be an issue applying lime after the application. We would encourage you to get a soil test to determine the pH level of the soil you are treating also. This can be done at your local cooperative extension.
Tenacity Herbicide should be applied before soil temperatures reach 55 degrees if using as a pre-emergent. If as a post you would apply when the target weeds are actively growing and healthy.