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Thread: Unused herbicide in the sprayer

  1. #1
    Join Date
    Jul 2012
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    532

    Default Unused herbicide in the sprayer

    I have a 15 gallon and 200 gallon sprayer, and both leave a trace amount of herbicide in the tank that the pickup tube can't reach. I was wondering how this enters y'alls calculations, especially when using very potent herbicides like Beyond and Cadre. For example, I spray Beyond at 4 oz/acre and it just works out easier to use the 15 gallon sprayer an acre at the time. Each application leaves behind maybe a quarter of a gallon of mix that the pump can't get. That tells me that I sprayed just short of 4 oz/acre mixture, and the next fill up could be stronger if I don't completely drain the tank. I run into the same problem with the big sprayer but it's much more forgiving with what I spray on the pastures. Should I bump the oz of Beyond up some knowing I won't be able to spray everything in the tank?

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  2. #2
    Join Date
    Dec 2007
    Location
    Providence
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    5,257

    Default

    I wouldn’t worry about it. Close enough.

  3. #3
    Join Date
    Nov 2006
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    In the thick of it.
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    5,811

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    Quote Originally Posted by Whackumstackum View Post
    I wouldn’t worry about it. Close enough.
    Yep.
    Quote Originally Posted by ecu1984 View Post
    Go Tigers!

  4. #4
    Join Date
    Nov 2007
    Location
    Newberry SC
    Posts
    3,254

    Default

    Capacity and usable gallons are not always the same. Applies to any tank. Fuel, spray tank etc

  5. #5
    Join Date
    Dec 2006
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    Georgetown
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    2,436

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    Yea you are over thinking it. You’re talking about a fraction of an ounce of actual chemical left over.


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    Conservation means the wise use of the earth and its resources for the lasting good of men. -Gifford Pinchot

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  6. #6
    Join Date
    Nov 2006
    Location
    Chapin
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    7,703

    Default

    What everyone else said, you’re talking about 4 oz of chemical to 1920 oz (15 gal) of water.


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    Quote Originally Posted by ecu1984 View Post
    "The Gamecocks are hammered dog shit"

  7. #7
    Join Date
    Aug 2012
    Location
    Charleston
    Posts
    212

    Default

    I wouldn't worry about the calculation but I'd empty the tank and rinse it out. I know for sure glyphosphate congeals into nasty shit and will eat the valves up.

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