4-Speed XT Selective Herbicide - Questions & Answers

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  • Asked by Rudolf from Bluffdale, Utah
    04/27/2019
    Q
    What is the mix rate for 4-Speed XT in a 4-gallon tank sprayer?
    A

    4-Speed XT  is mixed at 1.1 - 1.5 oz. per 0.1 - 5 gallons of water per 1,000 sq. ft. You would need 4.4 fl oz to 6 fl oz of 4-Speed XT in 4 gallons of water to treat 4,000 sq ft. depending on what you are treating.  Please see the product label for complete application instructions. 

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    3 of 4 people found this answer helpful.
  • Asked by Thelma from Charlottesville
    09/24/2022
    Q
    Should you add a surfactant with 4-Speed XT Selective Herbicide?
    A

    Yes,  a surfactant can be added to 4-Speed XT Selective Herbicide to increase effectiveness on weeds but is not required. The label does state that if one is added some turf damage may occur due to reduced selectivity. 

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    2 of 2 people found this answer helpful.
  • Asked by David from Nashville
    09/03/2014
    Q
    I have a 5 gallon backpack sprayer...what it is the mixture rate per gallon for 4-Speed XT?
    A
    Please refer to pages 4-6 of the product label for specific mixing and application instructions as they will vary for the type of grass you are applying the 4-Speed XT to. Please let us know if you need anything else.
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    2 of 25 people found this answer helpful.
  • Asked by Ulysses from Little Rock
    04/30/2018
    Q
    Can 4-speed be applied to bermuda grass in the spring?
    It's early spring and my bermuda is coming out of dormancy. Can I apply 4 speed to kill wild violets without harming the bermuda?
    A

    4-Speed XT is labeled for wild violet and is safe to apply to most types of Bermuda grass.  The label states that some hybrid Bermuda species may be sensitive to this product.  It would be a good idea to confirm which species you have before using the 4-Speed if you are not sure.  

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    2 of 2 people found this answer helpful.
  • Asked by Herbert from Saraland, Al
    09/28/2015
    Q
    Can 4-Speed XT be used on St Augustinegrass?
    A

    4-Speed XT does not list that it is safe for use on St Augustine grass on the product label so it would not be recommended.

    If you could please tell us what you are trying to treat for we would be able to make a better recommendation

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    2 of 4 people found this answer helpful.
  • Asked by Roger from St. Cloud, Fl
    02/11/2019
    Q
    Does 4-Speed XT come in less than a 2.5 gallon container?
    A

    4-Speed XT is only available in the 2.5 gallon size. 

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    1 of 5 people found this answer helpful.
  • Asked by Eleazar from San Clemente, Ca
    12/04/2017
    Q
    Tengo hierba en pasto San Agustin, puedo aplicar 4-Speed XT?
    A

    Desafortunadamente, 4-Speed XT no esta etiquetado para usarse en San Agustin. Si sabe que tipo de hierba mala quiere matar tal vez podriamos recomendarle otro producto. Dejenos saber si podemos ayudarle en algo m

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    1 of 2 people found this answer helpful.
  • Asked by John from York
    10/17/2019
    Q
    Can 4-Speed XT be applied with a hose-end sprayer?
    A

    Yes, 4-Speed XT can be used in a hose-end sprayer, however, it is not recommended with herbicides because the accuracy of application can significantly be reduced. We would recommend a backpack or hand pump sprayer.  

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    1 of 2 people found this answer helpful.
  • Asked by Steve from Murfreesboro,tn
    04/17/2021
    Q
    Will 4-Speed XT irradiate sage grass?
    A

    4-Speed XT is not labeled to control sage grass aka broomsedge.  

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    1 of 1 people found this answer helpful.
  • Asked by Jeff from Gordonsville, Va
    04/27/2021
    Q
    Is 4-Speed XT Selective Herbicide best applied in the early morning or late afternoon?
    A

    You can apply a post-emergent herbicide such as 4-Speed XT in the morning or afternoon in mild weather. Be sure you do not apply in the hottest part of the day if temperatures are over about 85 degrees since that may cause injury to desirable grass in the area. If you need to apply 4-Speed when the afternoon temperaturs will be hotter, then it would be best to apply the herbicide in the morning when desirable plants are less susceptible to damage. Be sure to read and follow the complete product label.

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    1 of 1 people found this answer helpful.
  • Asked by Benjamin from Rushville
    08/19/2017
    Q
    Can 4-Speed XT be tank mixed with quinclorac?
    A

    4-Speed XT can be mixed with other herbicides.  We would suggest performing a small jar test before mixing a large batch to be sure that the two products are compatible.

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  • Asked by Karl from Heath Springs Sc
    03/19/2022
    Q
    Can 4-Speed XT Selective Herbicide be used on centipede grass to kill wild violet?
    A

    Unfortunately, 4-SPeed XT is not labeled to be used on centipede grass. 

    Ferti-lome Weed Free Zone is labeled for wild violet and many other broadleaf weeds and safe for centipede lawns.

    For centipede lawns, apply at the rate of 0.75 to 1.5 fl oz per 1000 sq ft. Please view the full product label for more information. 

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  • Asked by Henry from Grays Lake Odaho
    09/28/2021
    Q
    Will 4-Speed XT Selective Herbicide kill morning glory and black medic?
    A

     4-Speed XT Selective Herbicide lists both morning glory and black medic as a weed controlled.  Please refer to page 4 of the product label for rates based on the type of turfgrass you have. 

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  • Asked by Dennis from Winona, Mn
    09/27/2021
    Q
    Is a surfactant recommended with 4-Speed XT Selective Herbicide?
    A

    Yes, a surfactant can be used with 4-Speed XT Selective Herbicide however the product label advises the following: "Adding oil, wetting agent, or other surfactant to the spray may be used to increase the effectiveness on weeds, but doing so may reduce the selectivity to turf resulting in turf damage.

    It is recommended to do a small compatibility test in a glass jar prior to the application. Review the full product label for more information and Compatibility Instructions on page 5. 

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  • Asked by Edward from Boca Raton, Fl
    08/14/2019
    Q
    Can 4-Speed XT be used with Saint Augustine and with Floratam?
    A

    4-Speed XT does not list that it is safe for use on any species of St Augustine grass on the product label so it would not be recommended.

     

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  • Asked by Mark from West Valley City , Ut
    07/15/2018
    Q
    How much 4-Speed XT needed for a four gallon back pack sprayer?
    A

     

    When using herbicides such as 4 Speed XT, the amount of water is dependent on the how much water it takes to cover a 1,000 sq ft area. The best way to gauge this is by marking off a 10ft by 100ft area. Fill your pump sprayer and "mock" spray the area thoroughly. This will tell you how much water to mix the 4 Speed XTwith.  

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    0 of 1 people found this answer helpful.
  • Asked by Smooth from Forest Hill,la
    07/01/2014
    Q
    Can I spray 4-Speed XT on green leriope?
    A
    4-Speed XT is not labeled for application to Green Lirope. To more accuratly asnwer your question, please contact Nufarm 800-345-3330 the manufacturer.
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    0 of 2 people found this answer helpful.
Displaying 21 to 37 (of 37 questions)