We do not recommend using dish soap to replace the required surfactant when using QuinKill Max Crabgrass and Weed Killer. Some can be ionic and may damage your lawn. We recommend using something like Duo Stick for best results.
QuinKill Max could be used on buffalograss for crabgrass control. For best results combine with an adjuvant such as DyneAmic which helps the product penetrate the waxy coating of leaves.
QuinKill Max Crabgrass and Weed Killer has a three year shelf life from the date of purchase if stored in a cool, dry place away from extreme temperatures. Once mixed with water and surfactant it should be used within 24 hours of mixing
QuinKill Max Crabgrass and Weed Killer along with the Duo Stick Surfactant could be used to control torpedograss in bermuda as well as many other listed weeds.
After speaking with the manfuacturer they have advised to use the Quinkill Max Crabgrass and Weed Killer to treat the crabgrass and to rotate your application with the Speedzone to prevent resistance of the herbicide. You can mix with Pendulum 3.3 EC to create a better residual effect. It is recommended to use a surfactant when applying the product to gain better control.
As with most herbicides like QuinKill Max the exact volume of water is not very important, you just need to be sure you are getting the correct amount of product on a specific area. Generally speaking 1 gallon covers 1000 sqft, so you can apply 1.45 fluid ounces in 1 gallon for spot treating. QuinKill can kill common dandelions but does state on the label Tank mix partner or sequential application required. Did you use a methylated seed oil surfactant which is required for use with this product? If you did not use a MSO with the product that could be the reason for not having success. Also the active ingredient in QuinKill is a slow kill can take up to 6 weeks to kill sprayed weeds when used as directed.
The Hi-Yield Crabgrass Weed Control and Dimension 2EW are primarly pre-emergent herbicides and will not control existing crabgrass. Dimension 2EW will have early post-emergent control of crabgrass, but only until about the second-tiller leaf stage. For better post-emergent control of crabgrass, we would suggest using Quinkill Max, which contains quinclorac. Quinclorac is the most popular post-emergent herbicide for crabgrass on cool-season turf. Be sure to use a surfactant such as Prime Source Duo Stick with QuinKill Max. This surfactant greatly helps reduce surface tension of applications to maximize absorption of the herbicide into the target plants. Post-emergents will work best on young, actively growing plants.
Quinclorac is a great active to use and it must be used with a methylated seed oil surfactant such as Duo Stick for best results. With QuinKill max that you purchased, the timing is key though, under certain conditions, application of QuinKill made to annual grasses at 2 to 4 tiller may not provide complete control. A sequential application will be required for grass control in these situations. Optimum control is achieved when applications of QuinKill + methylated seed oil are applied either before second tiller or as weed grasses mature.
What rate was it applied it? Do you know what tiller stage the crabgrass was at? How many applications have been made at what timing between them? What type of surfactant was used? Q is a slow kill and can take up to 6 weeks to kill.
Q4 is an alternative that can kill faster and Dimension as a pre-emergent is good, it also has early post emergent crabgrass control.
QuinKill Max Crabgrass and Weed Killer is labeled for use as spot application in established Bermuda turf as directed. As with most herbicides, the exact volume of water is not very important, you just need to be sure you are getting the correct amount of product on a specific area. Generally speaking 1 gallon covers 1000 sq ft, so you can apply 1.45 fluid ounces in 1 gallon for spot treating. It is recommended to apply with a methylated seed oil surfactant. It offers a kill to listed weeds and takes up to 6 weeks to kill sprayed weeds when used as directed.
