Pre-emergence advice/help

Discussion in 'Pesticide & Herbicide Application' started by greeninga, Feb 10, 2008.

  1. greeninga

    greeninga LawnSite Member
    from GA
    Messages: 81

    I maintain a ball field that I put pre-emergence down three (3) times a year, once in february, april, and september. Does that sound about right? There are still some weeds in it now but too many. Should I throw in another application of pre- emergence another time in the year, if so when? Thanks for any info.
  2. boats47

    boats47 LawnSite Member
    Messages: 244

    Are you sure you are not exceeding any total active per 1000/yr? It seems to be a bit much to me. I would keep to 2x season, once in the spring and once late fall or 2x in the spring. Then break out the sprayer to smoke anything left over, it might be cheaper and more effective for you.
  3. greeninga

    greeninga LawnSite Member
    from GA
    Messages: 81

    I thought that pre-emergence only works for about a three (3) month period. That's why I was saying to myself I should put out another application in there, but should check first.
  4. Midstate Lawncare

    Midstate Lawncare LawnSite Senior Member
    Messages: 267

    why not post-emergent in june? maybe do your first app in march, then june then september.... 12 weeks apart. Try changing up the chemical used too. or maybe change from granular to liquid.
  5. JoeinJasper

    JoeinJasper LawnSite Member
    Messages: 173

    Read and follow label directions. Some products last 3 months, some up to 6 months. The label will also give you the maximum active ingredient per acre per year. Joe

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