Safe temps to spray 2/4D?

Discussion in 'Pesticide & Herbicide Application' started by speedster, Nov 1, 2010.

  1. speedster

    speedster LawnSite Member
    Posts: 190

    I want to spray my lawn once before winter to kill off some dandelion and plantain. Last night it frosted and got down to 28 degrees and is in the high 50's during the day. The bottle says not to spray under 45 degrees but it's not clear as to whether that means 45 degrees daytime temp or 45 degrees nighttime.

    Today it is again going to be in the high 50's with lows tonight around 28. Is it safe for me to spray this afternoon?

    FYI, I'm got 8 week old overseeded TTTF that doing well and hsa been cut at least 8 times.
     
  2. cgaengineer

    cgaengineer LawnSite Fanatic
    Posts: 15,782

    The main thing to watch out for are high temps, lower temps mean it will take longer to kill weeds. An ester based 24d product will speed up the kill in cooler temps.
     
  3. speedster

    speedster LawnSite Member
    Posts: 190

    Okay definate no worries here about being too hot. The forcast in my area is shown below. When would be the optimal time for me to spray? Should I do it a day or so before rain is expected? I cut grass this past saturday so it has two days on the cut.

    cast.PNG
     
  4. CHARLES CUE

    CHARLES CUE LawnSite Silver Member
    Posts: 2,091

    Wait till the frost goes off it will be fine they will die so slow.

    Charles Cue
     
  5. cgaengineer

    cgaengineer LawnSite Fanatic
    Posts: 15,782

    You may try to speed up the kill using Octane. I replied to a thread this morning that I have yet to notice the kill sped up with Octane...I think I am wrong. One of the properties I sprayed last week the weeds were smoked.
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