Reduce mixing rates when tank mixing?

Discussion in 'Pesticide & Herbicide Application' started by premierlawncaremi, Apr 18, 2013.

  1. premierlawncaremi

    premierlawncaremi LawnSite Member
    Posts: 58

    When tank mixing two chemicals such as a 3-way (1.5 oz/K) and Drive (1.45 oz/K) do you need to reduce the rates of each chemical or would you keep it the same so it would be a total of 2.95 oz/K? Any help would be greatly appreciated, this has always confused me as labels don't specify!
     
  2. Think Green

    Think Green LawnSite Silver Member
    Posts: 2,746

    The label is the law!
    The label tells how much of what chemical you can partner up with and what rates.
    As far as me using--Prodiamine and lets say Vessel..........I use the labeled rates. As using herbicides with different modes of action isn't uncommon, the label will direct you to do a compatibility test. As far as using a reduced rate.........it depends on the label. Barricade is one that has reduced or split app rate charts. If the label shows it, then you can do it. Lets keep things in line so we don't lose any more herbicides to misapplication practices.
     
  3. Efficiency

    Efficiency LawnSite Bronze Member
    from zone 6
    Posts: 1,536

    Why would you blanket spray drive?
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  4. premierlawncaremi

    premierlawncaremi LawnSite Member
    Posts: 58

    Not doing a blanket app..
     
  5. White Gardens

    White Gardens LawnSite Fanatic
    Posts: 6,776

    When you have a massive CG outbreak.

    If you read the label also, Drive has a relatively broad spectrum of control for other weeds also and a long residual.

    Had to blanket spray a lawn with drive a few years back and got super killer control on a host of other weeds.


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  6. White Gardens

    White Gardens LawnSite Fanatic
    Posts: 6,776


    From what I'm recalling from our recent pesticide tests.

    You can mix chems even if the label has no specific instructions.

    If you have doubts, then call the maker of the chem.

    But you must do the compatibility/jar test to make sure they will mix correctly. I've seen some chems in compatibility tests do some crazy things.




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  7. premierlawncaremi

    premierlawncaremi LawnSite Member
    Posts: 58

    So what I'm asking...if the compatibility test passes then do I reduce rates of each chem??
     
  8. White Gardens

    White Gardens LawnSite Fanatic
    Posts: 6,776

    This is my answer,

    No, use the recommended calibration rates for each chem.

    The only time I would reduce either chem would be if each chem had one active ingredient that was the same. Then at that point, you would reduce the amount used of each to compensate for the max application rate for that single active ingredient that was in the mix.

    With the Three way and Drive, if I'm not mistaken, they are completely different formulations. Drive is a Carboxylic Acid. (same type of carbon chain that Imprellis was based off of).


    The only thing I might worry about is the non-ionic surfactant that is needed for Drive to work effectively. I would look into your 3-way and make sure that is compatible with it. Or call the manufacture and make sure it is.


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  9. premierlawncaremi

    premierlawncaremi LawnSite Member
    Posts: 58

    Thanks, that answers my question! I've used Drive before with no surfactant or any additive at all and had great results...
     
  10. White Gardens

    White Gardens LawnSite Fanatic
    Posts: 6,776

    I'be personally have had less than desirable results when not using the correct surfactant. Once I got the right one, I got great results, even with blanket apps at half the recommended rate. Though it wasn't a complete kill, it stunted the cg to a point where it couldn't thrive, and everytime it rained, it would stunt it again.
    Posted via Mobile Device
     

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