If you are doing a full lawn renovation and wanting to kill existing plants before sodding, then we would recommend using a non-selective herbicide to clear the area before planting. You could use a product like RoundUp QuikPro for this application. Then after any existing plants have died and the lawn is prepared, you could put down your sod. We would suggest applying Tenacity after the sod is down as a pre-emergent (or post-emergent as needed) as long as the turf is one that is listed as tolerable on the product label. Keep in mind that the best time to use Tenacity for bentgrass will be in late Summer/early Fall.
The product label states that Bermuda grass is sensitive to Tenacity but it would not be recommended as a product specifically used to kill it.
You do not need to water after a post emergent application of Tenacity.
Yes, Tenacity Herbicide is labeled for use on Buffalograss.
Tenacity is labeled for use on St Augustine grown for sod only and would not be recommended on a home lawn. Could you tell us what you are trying to treat for and we can try to recommend a product that you can use?
If the use rate of Tenacity Herbicide is of 5 oz per acre, you’ll need to use 0.11 oz or 6/10 of a teaspoon per 1,000 square feet.
Tenacity is labeled for postemergent control of nutsedge. However, the product label does state that weed control with postemergence applications require a second application after 2 to 3 weeks. You should also make sure that you apply the Tenacity to young, actively growing weeds with a non-ionic surfactant.
It would be best if clippings were bagged after the first mow and application of Tenacity Herbicide. Bagging will help with lawn health.
Tenacity Herbicide is labeled to treat for actively growing ivy.
Tenacity Herbicide can be used if weeds are actively growing for post emergent control as long as the soil temperature is 55 degrees Fahrenheit. This product can also be used for pre-emergent control right now once the soil temperature reaches 55 degrees Fahrenheit. Be sure to water the product in at least 1/2 inch after a pre-emergent application to ensure the product gets down into the soil.
Per the label of Tenacity Herbicide, this product can be applied at the same time of seed, except fine fescue. It is also recommended that you mow at least two days before and/or two days after.
Tenacity Herbicide is labeled for use on Tall Fescue, Kentucky Bluegrass, Centipedegrass, Buffalograss, Perennial Ryegrass, Fine Fescue, St. Augustine Grass, so no it will not kill the fescue in your Kentucky Bluegrass lawn. Tenacity is a systemic pre-emergent and postemergent herbicide for the selective contact and residual control of weeds in turfgrasses. When applied as a pre-emergent, Tenacity Herbicide should be applied before soil temperatures reach 55 degrees.
You can spot treat the fescue with a non-selective herbicide such as Killzall and reseed with bluegrass.