help with calibration

Discussion in 'Pesticide & Herbicide Application' started by lawnbridge, Oct 25, 2007.

  1. lawnbridge

    lawnbridge LawnSite Member
    Posts: 97

    I have a 25 gallon sprayer, I marked off 1,000 sf and walked a normal pace spraying water and did it in 1 minute. I then sprayed for 1 minute in a calibration measuring container. It came up with 1/2 gallon. My question... If I am putting down Pendelum and it calls for 1.3 - 1.8 oz per 1,000 sf., If I was to use 1.5oz per 1,000 sf. How much Pendelum should I use?
     
  2. ArizPestWeed

    ArizPestWeed LawnSite Bronze Member
    Posts: 1,457

    25 gals times 1.5 oz = 37.5 ounces of Pend
     
  3. rider

    rider LawnSite Member
    from ohio
    Posts: 152

    1/2 gal per 1000sq ft , 25 gal tank =50,000 sq ft

    1.5 oz pendulum x 50 = 75 oz pendulum
     
  4. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,353

    I doubt if this would work--solution would be too thick. Probably you have no agitation. Maybe Dimension liquid would work.
     
  5. Runner

    Runner LawnSite Fanatic
    Posts: 13,494

    Wait a minute....Red Flags going up ALL OVER here. First, you are saying that you walked this out...meaning you are pulling hose? Then you are asking about mixing rate formulas, which tells us inexperience (no biggy), HOWEVER. If you are spraying 1/2 gal. per 1000 out of a hose, this is WAY too hot to be spraying from a hose - let alone for someone without experience. This is a sure recipe for disaster. I'll give a hint...1 gal. per 1000 is a hot mix to be spraying - even for an experienced, well seasoned applicator
     
  6. (wi) Roots

    (wi) Roots LawnSite Member
    from 9
    Posts: 152

     
  7. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,353

    Does this mean you are using an electric sprayer (12 volt)? Do you mean you are applying a half gallon per one thousand sq ft? Gun or boom?

    What weeds in Texas at this time of year?

    A granular application would work out better--that is my guess. You can cover 2000 sq ft per minute granular.
     
  8. bug-guy

    bug-guy LawnSite Senior Member
    Posts: 977

    math says 1/2 gal per 1000 of h2o should be 1.5 oz of chem per 1/2 gal of water
    3 oz per gal = 2000 sq ft
    this does seem to be low volume of water but some elect units are like that
    i would prefer a higher volume like 3 gal of water per minute but some times you do what with you have
    exercise care.
     
  9. (wi) Roots

    (wi) Roots LawnSite Member
    from 9
    Posts: 152

    Application rate =

    (Average output per nozzle) x (Number of nozzles)
    ______________________________________________

    Area covered


    Average output: 64oz./128= .5



    .5 x 1 nozzle
    ___________________________ = .0005 gallon per square foot

    100 x 10


    1000 x .0005 = .5 gallon per 1,000 square feet (or)
    43560 x .0005 = 21.78 gallons per acre
     
  10. Green Dreams

    Green Dreams LawnSite Senior Member
    from Texas
    Posts: 593


    This is the best post on this thread.

    And down here in SE Texas Megalawn Co starts putting out simizine in Sept.
     

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