Yes, Tenacity Herbicide can be applied with morning dew on the lawn. Morning dew will not lessen the effects of Tenacity. In some circumstances, a more moist soil will make for better root uptake. You are safe to make the Tenacity application in the cooler times of the day when temps are below 85 degrees.
It is not recommended to use a hose-end sprayer to treat your lawn with Tenacity Herbicide or any other herbicide. The problem with using hose-end sprayers is that they are not very accurate and you can wind up dispensing more or less product than recommended per area and that can lead to less than desirable results.
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.
Tenacity Herbicide is labeled to eradicate some broadleaf weeds. Please refer to the product label for a list of all weeds controlled.
Tenacity Herbicide is only labeled for use on St. Augustine grass that is grown on sod farms. It cannot be used on St. Augustine in residential lawns. Blindside WDG Herbicide is labeled to treat crabgrass in residential St. Augustine lawns.
Tenacity can be applied to St Augustine lawns at a rate no higher than 4 fl oz per acre. But only if St Augustine was grown from sod and not from seed.
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.
Before applying Tenacity you must wait until the newly germinated turf has been mowed two times or four weeks after emergence (whichever is longer) before making a postemergence application.
Yes, Tenacity Herbicide is labeled to control Pennsylvania Smartweed.
Tenacity Herbicide is only labeled for use on St. Augustine grass that is grown on sod farms. It cannot be used on St. Augustine in residential lawns. Blindside WDG Herbicide is labeled to treat crabgrass in residential St. Augustine lawns.
Tenacity Herbicide is only for use on St Augustine when used in sod farm and cannot be used on home lawns that have St Augustine.
The product label for Tenacity does state that roses and daylillies are sensitive to it and to avoid over-spray or drift.
There is no wait time after applying Tenacity Herbicide to re-seed unless you are re-seeding with fine fescue. For fine fescue, it is recommended that you wait at least 30 days after application to re-seed. Be sure that your mix does not contain seed that will not be tolerable.
Tenacity is labeled as a pre and post emergent for crabgrass but only as a post emergent for nimblewill. The most effective product to control nimblewill pre-emergently has been removed from the market (MSMA). We have had a lot of folks report that Dimension does a pretty good job pre-emergently but since the product is not technically labeled for nimblewill we cannot legally recommend it for this use.
Tenacity Herbicide should be used when the temperatures are consistently above freezing on a daily basis. Your target temperature range will depend on whether you are using Tenacity for pre-emergent or post-emergent applications. This is typically between 65-85 degrees. Please consult the product label for complete application instructions.
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.
Tenacity Herbicide should not be used within 3 feet of desirable trees or ornamentals.
Tenacity Herbicide would be mixed at the same rates listed on the label on your turfgrass for using solo when tank mixing with Barricade. You would only used reduced rates if mixing with atrazine, bentazon or simazine.
Tenacity Herbicide is labeled to be safely applied to fine fescue and is not labeled to kill it so we cannot recommend it for that use. When you are trying to remove another cool season turf type from KGB the best option is to use a product like Roundup Quikpro (or non selective/glyphosate) and then re-seed with your KBG.
Tenacity Herbicide can be used when weeds are actively growing. It also can be applied when seeding with some grass types. You can check with your local cooperative extension office Master Gardener for specific timing in your area.
