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Discussion in 'Pesticide & Herbicide Application' started by Russ, Feb 14, 2003.

  1. Russ

    Russ LawnSite Senior Member
    Messages: 540

    How many of you monitor GDD? I know it varies greatly by micro-climate. Do you monitor and do you find it useful?
  2. TSM

    TSM LawnSite Senior Member
    from MA
    Messages: 707

    monitoring Growing Degree Days is an excellent way to be prepared for potential insect populations.

    we don't use it in our lawn care but do use it in our tree/shrub care.

    we don't monitor daily temperatures ourselves, we call our extension service couple of times per week and get the info from them.
  3. Kent Lawns

    Kent Lawns LawnSite Senior Member
    from Midwest
    Messages: 870

    I get a weekly e-mail update on GDD that we utilize to a more or lesser degree. (no pun intended.)

    Do we use it as much as the horticulturalists would have us? No. We know when certian pest problems appear every year and with weather and scheduling issues, we're just not that precise.
  4. Ric

    Ric LawnSite Fanatic
    Messages: 11,969

    GDD is more constant year to year in S.W.Fla. therefore is and isn't used here. Because of lack of long hard freezes insect pressure is year round. Since GDD is more constant here we simply use the calendar to schedule scouting and preventative treatments.

    Bayer Labs Has a program for Merit's use on Mole Crickets and Grubs. By signing up with Bayer Labs they will e-mail you a date to apply Merit. It Merit fails they supply Dylox for free to cure the problem.

    The Way Bayer Labs Comes up with the Date of Application is not GDD. They have an entomologist who travels the state and digs up mole cricket. He cuts open the mole crickets and determines when egg hatch will occur. North to South Gods Waiting Room is over 300 miles. Therefore dates vary.

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