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.
As a pre-emergent, Tenacity will only last about 30 days, so you may re-apply after 30 days if necessary making sure you do not exceed the max application rate per year. However, the product label states “If used for preemergence in established turf, tank mixtures with preemergence herbicides such as Barricade® 65WG Herbicide are recommended for longer residual and broad spectrum weed control.”
Once the application of Tenacity Herbicide has had time to dry it is safe for pets and children to reenter the treated area. Typically after 4-6 hours. The small amount of active left is not enough to injure a dog that may eat the rass.
Tenacity Herbicide is best applied right at the time of seeding or close to for best results. It can be applied later if needed for the turfgrasses listed on the label with the following precaution: 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.
Tenacity has been tested in tank mixtures with Barricade 65WG Herbicide (prodiamine) so yes, it would be okay to use. You would use the labeled rates for the Prodiamine, which when mixed correctly should not clog a tank sprayer.
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 may be required depending on what weeds you are treating.
Yes, you can see some whitening of new grass after applying Tenacity. Unless renovating and/or re-seeding the home lawn, avoid broadcast applications of Tenacity for pre and post-emergence weed control because undesirable whitening of some turf grasses may occur.
If you are applying Tenacity as a pre-emergent herbicide at all, then you would want to do any work that would disrupt the soil (such as aeration) before putting down your pre-emergent. For post-emergent control, we recommend waiting a minimum of 2 days – but ideally at least a week – after applying the herbicide before aerating. You can apply Tenacity before or at the same time that you put down seed; just do not apply Tenacity to the new seedlings until the new turf is established.
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 without harming your centipede lawn. Make sure to read the Tenacity 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. Please let us know if you have any other questions.
Tenacity Herbicide would be best applied in temperatures below 80 degrees.
Yes, you can fertilize at the time (first application) when using Tenacity Herbicide. Please let us know if we can be of any further assistance.
SInce you can use Tenacity Herbicide either prior to or during seeding of certain turfgrasses you could either aerate before or after using the product and it would still work. There is nothing on the product label stating that there is a certain time to do aerating.
Tenacity Herbicide is not labeled for bahiagrass. However, you could use a product like ProSedge Herbicide. It is labeled for bahiagrass and is safe for use on various types of lawns, including St. Augustine, as long as it is not Floratam.
After using Tenacity Herbicide you can triple rinse the sprayer or use a spray tank cleaner to ensure no residual is left.
Tenacity Herbicide states on the product label: Avoid applications over the top of exposed roots of trees and ornamentals. Just about all herbicides are going to have the restriction that applications should be kept out of the dripline of desirable trees. The best you could do is carefully spot treat the weeds themselves and not broadcast in these areas.
It is recommended that you do not mow 2 days before or 2 days after the application of Tenacity Herbicide.
Tenacity Herbicide can be used at the time of seeding for most grass types. Fine fescue is the only grass seed that should not be used at the time of application. It is recommended that you wait 2-4 weeks after an application of Tenacity Herbicide to reseed with fine fescue.
