/ Register

Welcome to OrchidsForum.com. We are a friendly online community for Orchid Growers all over the world. If you haven't joined yet we invite you to register and join our community. Hope to see you on our forums!

Mixed Enstar or Merit

Discussion in 'Issues, Disease and Pests' started by Jon, Jun 26, 2010.

  1. Jun 26, 2010 #1
    Jon

    Jon Mmmm... bulbophyllum...

    Messages:
    4,437
    Likes Received:
    103
    Location:
    Denver CO, USA
    If I mix a batch of Enstar and/or Merit today, for how long will the mixture be effective? I'd like to keep a small spray bottle in the GH to spot-treat plants as needed. Thanks.
     
  2. Jun 27, 2010 #2
    Paul J

    Paul J New Member

    Messages:
    52
    Likes Received:
    2
    Merit/Enstar degradation

    Imidachloprid - check this for details: http://pi.ace.orst.edu/search/showPDF.s?docNum=2#xml=http://pi.ace.orst.edu/search/pdfHL.s?docNum=2

    to question: At pH 7, only 1.5% of the initial concentration of 20 mg/L of imidacloprid was •• lost due to hydrolysis in three months, whereas
    at pH 9, 20% had been hydrolyzed in samples that were kept in darkness for the same time period

    According to this sheet, imidachloprid is apparently stable over long periods of time. Possibly this is why the EU countries treat it suspiciously.

    Re kinoprene - don't know.

    In all cases I use SRoT, mix and use. 24 hr max. All mixtures degrade and lose efficacy with time, pH, photolysis, chemical binding and degradation, etc.
     
  3. Jun 27, 2010 #3
    Jon

    Jon Mmmm... bulbophyllum...

    Messages:
    4,437
    Likes Received:
    103
    Location:
    Denver CO, USA
    Thanks Paul. Sounds like imidacloprid is more persistent than I thought.
     
  4. Jun 27, 2010 #4
    This_guy_Bri

    This_guy_Bri weirdo

    Messages:
    868
    Likes Received:
    5
    Location:
    here
    yup. i think that's why it's not registered for use on long island as it can easily contaminate ground water
    there's a chance i just made this fact up, but i don't think so
     
  5. Jun 27, 2010 #5
    Marni

    Marni Well-Known Member Staff Member Supporting Member

    Messages:
    13,582
    Likes Received:
    3,389
    Location:
    Santa Rosa, CA
    It appears that it is stable in the bottle, but I don't think that addresses the question if it persisits once applied.