Tenacity Herbicide is labeled to treat for Windmill grass.
For best results, do not apply Tenacity Herbicide when rainfall is forecasted to occur within 48 hours.
If you have already seeded, then you do not want to apply Tenacity Herbicide to the newly seeded turf until is has been mowed two times or four weeks after emergence (whichever is longer) before making a postemergence application.
Tenacity Herbicide should be applied before soil temperatures reach 55 degrees if using as a pre-emergent. If using as a post-emergent you would apply when the target weeds are actively growing and healthy. You can check with your local cooperative extension office Master Gardener for specific timing in your area.
The amount of Tenacity Herbicide that is used is based on the amount of area you are treating. With herbicides, the amount of water is not as important as the amount of water that is being used. The rate we would recommend using is 5 fl oz to cover an acre. This can be mixed in 25-30 gallons of water to cover an acre.
There should be no issues applying Tenacity around the same time as a fertilizer like the Coron, as long as both label instructions are followed.
Tenacity Herbicide cannot be applied to Bermuda unless fully dormant.
Yes, it is possible for Tenacity Herbicide to inhibit growth of new seedings if over applied.
Roundup products contain glyphosate which is non selective so kills pretty much anything that it is applied to. Selective herbicides like Tenacity Herbicide only kills those weeds that are listed on the product label and are generally safe for use on turfgrass.
Tenacity Herbicide is one of the few products that can be applied at seeding, prior to seeding, or just after seeding of new grasses to help prevent and control weeds at the same time. Be sure to check the label for any restrictions to certain turf types as Fine Fescue is more sensitive than other species when using Tenacity at seeding. Be sure to use a Non Ionic Surfactant with the Tenacity when applying for best results.
Per the label of Tenacity Herbicide, this product can be applied at the same time of seed, except fine fescue. It is recommended that you mow at least two days before and/or two days after.
Tenacity Herbicide is safe for established Kentucky bluegrass and ryegrass applications.
After further information from the manufacturer they have verified that to making a pre-remergent application with Tenacity you will need to apply a post emergent application once you detect germination of the weed itself. Syngenta recommends to apply no more than 3 application per year.
Tenacity cannot be mixed and then frozen for future use as the freezing temperatures would make the product ineffective.