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New water source... why isn't my herbicide working?

Discussion in 'Pesticide & Herbicide Application' started by hobbsd, May 15, 2008.

  1. hobbsd

    hobbsd LawnSite Senior Member
    from west wi
    Messages: 448

    I just moved shops and am having some issues with weed control. The amount of control is really limited!!

    Could my water be the problem? Is PH a problem??? it seems that we are dumping tons of herbicide on with minimal results.. Not sure why, but i've never had this problem before.

    Thanks for the help.

    PSUTURFGEEK LawnSite Senior Member
    Messages: 579

    If your'e Ph is off it's just like spraying water, the chemical binds to the minerals and clay in the hard water and affects the control, The strips I use are really accurate, basically it's green is awesome and dark orange is really bad, you want it to be atleast between green and yellow for good control.
    This happens so much more than people realize, usually when guys are filling on the road.
  3. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,723

    What kind of weeds? And what are you using for weeds? At what rate? And is the weather too cool for good response? We are seeing veronica--very tough. Violets--very tough. Henbit--too mature. Take a water sample in to your local Culligan man or bottled water dealer. They'll find out in a minute. Jest be prepared for the sales pitch.
  4. mngrassguy

    mngrassguy LawnSite Silver Member
    Messages: 2,167

    Get the test strips at any pool/hot tub supply store.
  5. TLS

    TLS LawnSite Fanatic
    Messages: 7,943

    How would you adjust pH in tank fill water? Is there an additive?
  6. grassguy_

    grassguy_ LawnSite Senior Member
    from Ohio
    Messages: 633

    most pool supply places will have Muratic Acid to adjust water Ph. Warning: only a small amount of acid will change the Ph considerably, so if you do adjust do so in very small amounts and check regularly.
  7. (wi) Roots

    (wi) Roots LawnSite Member
    from 9
    Messages: 152

    I.D. should be your first step.
    Season in which the thrive would be your next.
    Choosing your herbicide according too your findings.
    Apply at the recommended rate on label.
    Follow all law that goven your State when applying any herbicide and when in dought, hire a pro!
  8. humble1

    humble1 LawnSite Silver Member
    from MA
    Messages: 2,519

    so what pH should the water be? I dont see any reccomendation on the jug of SpeedZone Southern
  9. txgrassguy

    txgrassguy LawnSite Gold Member
    Messages: 3,083

    The worst possible additive for acidifying your spray solution is Muriatic Acid - unless you want to keep replacing seals especially in a chlorinated water source.
    Instead use clear vinegar available in the restaurant sized two gallon containers - much less expensive than acid, no where near as corrosive to pump seals, much safer to handle and at about 1.5ounces to 3 ounces per gallon depending upon pH in the host water supply you can use it as a rinse aid in your large measuring cup.
  10. americanlawn

    americanlawn LawnSite Fanatic
    from midwest
    Messages: 5,954

    We use city water that has a pH between 8.2 -- 8.7 depending upon the time of year.

    (8.0 pH is ten times more alkaline than 7.0. 9.0 pH is 100 times more alkaline).

    Acidifiers like LI700 do a nice job -- just follow the label, and you should get better results.

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