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  1. #1
    Join Date
    May 2011
    Location
    Menlo Park, CA, USA
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    85

    Default Oxalic Acid Vaporizer (oav). Sealing time after treatment?

    I just started using OAV and I wonder how long do you keep the hive sealed after treatment. The instructions say up to 10 min after treatment, but I see many in the YouTube videos don't continue to seal the hive at all after the 2:30 min treatment.

    Interested to hear opinion on what others do. To clarify what I mean by sealing the hive, I'm really just talking about cloth covering the entrance .

    Thank you for the advice.

  2. #2
    Join Date
    Mar 2016
    Location
    Naples, FL
    Posts
    206

    Default Re: Oxalic Acid Vaporizer (oav). Sealing time after treatment?

    If I could tag onto your thread - who does OA treatments other than vaporizer, how and why do you do it and how effective is it?

  3. #3
    Join Date
    Dec 2012
    Location
    Sacramento, CA, USA
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    4,659

    Default Re: Oxalic Acid Vaporizer (oav). Sealing time after treatment?

    You can test out the burn to see how long it takes for the oav to stop in
    open area outside. I use my oav gadget under the hive. So as soon as I
    take out the burner the oav stop. I waited one minute or so then move
    on to the next hive. Not sure if this is what you have also.

    Coach, Randy Oliver has published his findings on the oav and the dripple
    method. Just do a search to read up on it.
    Last edited by beepro; 04-20-2016 at 11:40 PM.
    Don't mix foreign bees into a virgin hive. She might get balled 100% of the time! When will you ever learn, huh?

  4. #4
    Join Date
    Apr 2015
    Location
    Sonoma County, Ca
    Posts
    328

    Default Re: Oxalic Acid Vaporizer (oav). Sealing time after treatment?

    I vaporize for 2.5 minutes, turn the power off and leave the vaporizer in for another 2.5 minutes, then pull the vaporizer out and seal with a damp rag for 10 minutes (+/-). A lot of vapor slowly leaks out of the hive during the last 10 minutes and the roar of the bees is loud. I think the 10 minutes is important to achieve full coverage.

  5. #5
    Join Date
    May 2011
    Location
    Menlo Park, CA, USA
    Posts
    85

    Default Re: Oxalic Acid Vaporizer (oav). Sealing time after treatment?

    Beepro, that is exactly what I do. Thanks for the confirmation.
    Norcalkyle,
    that is what I'm wondering about. My understanding is that the vapors turn to crystals in couple of minutes, but if you see vapors past 2 minutes, I might be totally wrong on my assumptions.

  6. #6
    Join Date
    Dec 2012
    Location
    Sacramento, CA, USA
    Posts
    4,659

    Default Re: Oxalic Acid Vaporizer (oav). Sealing time after treatment?

    When the bees fan while vaporizing they distributed the crystals
    all over. When the burning stops so is the vapor and crystals.
    I think allowing the extra 10 minutes is to make sure the hive is clear of
    the vapor. What can be gained when all the crystals are already in the hive and
    bees when you burn them in the 2 minutes run? In real time open area I have
    experimented a lot with the burning. As soon as I take out the burn source the
    vapor and crystals also stop vaporizing. Got a vid of it to prove too! I burn both
    inside the hive and on open area.
    Don't mix foreign bees into a virgin hive. She might get balled 100% of the time! When will you ever learn, huh?

  7. #7
    Join Date
    Jun 2013
    Location
    Rensselaer County, NY, USA
    Posts
    2,461

    Default Re: Oxalic Acid Vaporizer (oav). Sealing time after treatment?

    Different brands of wands have different user instructions so you should go with what's specified for your particular equipment.

    I follow the directions that came with my Varrox vaporizer:

    2 min 30 sec powered burn;

    2 min more with power off but with the wand still inside hive to complete the sublimation using residual heat in the pan;

    10 min shut-in time after I have withdrawn the wand;

    In very cold temps, i.e. low 40s and below, I add up to 15 secs more to the active burn time to compensate for the cold conditions. I arrived at this number by doing a test burns outside the hive.

    Enj.

  8. #8
    Join Date
    Nov 2009
    Location
    Manning, SC
    Posts
    4,095

    Default Re: Oxalic Acid Vaporizer (oav). Sealing time after treatment?

    Nancy in post #7 hit the nail on the head!
    http://OxaVap.com Your source for the Varrox Mite Killing
    OA Vaporizer "One of the highest ranked" by R. Oliver

  9. #9
    Join Date
    Apr 2015
    Location
    Boerne TX
    Posts
    77

    Default Re: Oxalic Acid Vaporizer (oav). Sealing time after treatment?

    I don't see the benefit of keeping the hive sealed. Once the OA is done burning and it crystalizes the process is done. The vapors turn into crystal after a few minutes, so why keep it sealed? I do my treatments from the top of the hive and after the OA burns I wait two minutes and move on.

  10. #10
    Join Date
    Nov 2009
    Location
    Manning, SC
    Posts
    4,095

    Default Re: Oxalic Acid Vaporizer (oav). Sealing time after treatment?

    Quote Originally Posted by cavscout View Post
    I don't see the benefit of keeping the hive sealed. Once the OA is done burning and it crystalizes the process is done.
    Not quite. The vaporization is done but you want the vapors to remain in the hive to coat all the surfaces to be picked up by the mites. What's the point of vaporizing and then letting a lot of the OA out? This is not just me saying this, this is what is recommended by studies and the manufacturers of the vaporizers who have done (and been doing this) for years........
    Last edited by snl; 04-21-2016 at 07:39 AM. Reason: spelling
    http://OxaVap.com Your source for the Varrox Mite Killing
    OA Vaporizer "One of the highest ranked" by R. Oliver

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