Certainty Herbicide should be applied when the burweed is actively growing and healthy. Usually weeds are best controlled when they have just emerged. Please contact your local cooperative extension office to determine the more exact timing of the application as this will vary greatly from region to region.
Certainty is not labeled as safe for use on Floratam and has the potential to harm this species of turf grass. Please let us know what weeds you are targeting so that we can better assist you in finding an appropriate product.
Fusilade Herbicide would not be recommended for KY Bluegrass. Quackgrass, unfortunately, is too closely related to Kentucky Bluegrass and most products that will kill quackgrass will also severely damage, if not kill, the KBG. The common recommendation is to kill the quackgrass with a glyphosate product like Roundup and then reseed with KBG. You might also check with a master gardener or local landscaping company in your area for their best recommendation.
Roundup Quick Pro Packs – http://www.domyownpestcontrol.com/roundup-quikpro-15-oz-packs-p-1125.html
When treating with Certainty Herbicide it can take time to see results based on the weather. Per the product label: Time to Symptoms: This product is absorbed by both the roots and the foliage of plants and rapidly inhibits the growth of susceptible weeds. Susceptible weed growth stops within 24 hours of treatment even though visual symptoms are slow to develop. Susceptible weeds usually show yellowing or browning within 2 to 3 weeks. Warm, moist conditions following application will accelerate herbicidal activity. Cold, dry conditions will delay herbicidal activity. Weeds stressed by drought are less susceptible to this product.
For suppression of Dallis grass in Bermuda apply this product at a rate of 1.25 oz per acre in a tank mix with 2lbs MSMA per acre and .25 oz Non Ionic Surfactant. Re apply same tank mix 2-4 weeks after initial application.
Barricade 65WG would be an excellent pre-emergent product choice to treat dallisgrass(Paspalum).
The amount of Certainty needed will depend on the type of weed you are trying to control and the amount of water you use will vary as water only acts as the carrier and is not set on amount of product per gallon of water. The rate range is 0.75 to 2.0 oz per acre mixed in 10 to 50 gallons of water per acre. The included scoop is generally the way to measure, but you can use another larger utensil (dedicated for this use or disposable) if desired.
There are no restrictions on mixing Drive XLR8 and Certainty Herbicide together, as long as you follow both the Drive product label and the Certainty product label for the type of turf that you have. You should always follow the more restrictive label when mixing herbicides, and we would recommend performing a small tank mix to be sure the two products are compatible before mixing a large amount of solution. Another option would be Solitaire Herbicide, which controls both nutsedge and crabgrass. You should not add a surfactant to Solitaire Herbicide. For southern grasses, another option is Dismiss South Herbicide. Dismiss also should be used without a surfactant.
For a post-emergent for dallisgrass, we would recommend using Certainty Turf Herbicide to supress the weed in bermudagrass. You will use 3-5 small scoops or 1-2 large scoops per gallon of water. This will treat approximately 1000 square feet.
Certainty Herbicide is labeled to suppress dallisgrass in bermuda but may not kill it completely. Several applications would likely be necessary.
Certainty Herbicide should be applied when weeds are actively growing and temperatures are between 65-85 degrees.
Certainty Herbicide - 1.25 oz. is not labeled to control Goosegrass. If you let us know what kind of lawn you have, we can find a product that would better suit your needs.
For the poa trivialis there is not a good method to get rid of this weed other than to spot treat with a non selective product like Rounup QuikPRO and over seed in those areas, or you can use a pre-emergent like Prodiamine 65 WDG in the fall to prevent the poa from growing in the first place. Certainty Herbicide is a selective herbicide with the active ingredient of Sulfosulfuron, which is not the same as a non selecetive Glyphosate product.
Certainty will not harm established Buffalo grass when applied as directed.