Homemade oxalic acid vaporizer - Page 5
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  1. #81
    Join Date
    Jun 2015
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    Deep Brook, NS, Canada
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    584

    Default Re: Homemade oxalic acid vaporizer

    Randy Oliver at scientificbeekeeping.com has some good info. Here's how to do an OA dribble: http://is.gd/U7JoLR

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  3. #82
    Join Date
    Dec 2009
    Location
    Topeka, Kansas, USA
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    134

    Default Re: Homemade oxalic acid vaporizer

    Here's the OFG bottom board vaporizer I've been working on, I think it is going to work out well for my small operation. Although I use top-entrance only hives, it should be adaptable to about any screened bottom board.
    http://mannell.net/?p=89

  4. #83
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    Nov 2009
    Location
    Manning, SC
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    5,198

    Default Re: Homemade oxalic acid vaporizer

    Quote Originally Posted by oldfordguy View Post
    Although I use top-entrance only hives, it should be adaptable to about any screened bottom board.
    There is no reason you can't vaporize from the top down should you wish..........
    http://OxaVap.com Your source for the ProVap 110
    OA Vaporizer. The fastest vaporizer on the market!

  5. #84
    Join Date
    Dec 2009
    Location
    Topeka, Kansas, USA
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    134

    Default Re: Homemade oxalic acid vaporizer

    Certainly; I've vaporized from the top effectively in the past, but it wasn't nearly as easy as my new system.
    Last edited by oldfordguy; 06-08-2015 at 08:45 AM. Reason: punctuation

  6. #85
    Join Date
    Dec 2013
    Location
    Des Moines, Iowa, USA
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    15

    Default Re: Homemade oxalic acid vaporizer

    Quote Originally Posted by oldfordguy View Post
    Here's the OFG bottom board vaporizer I've been working on, I think it is going to work out well for my small operation. Although I use top-entrance only hives, it should be adaptable to about any screened bottom board.
    http://mannell.net/?p=89
    Passing the OA vapors through the SBB will cause the OA vapors to cool and deposit onto the screen. The vapors need waft up into the frames where the bees are located and contact the mites. The further the distance and the more obstacles (SBB) reduces the effectiveness.

  7. #86
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    Dec 2009
    Location
    Topeka, Kansas, USA
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    134

    Default Re: Homemade oxalic acid vaporizer

    I thought about that; but only a very small percentage condenses on the screen. My main concern is the effect of the acid on the screen over time; it may well deteriorate the screen. If so, I will probably do away with the screen entirely and just use a removable slide in bottom. I haven't found the screen bottom necessary for ventilation, nor very beneficial to mite or small hive beetle in my area. I leave the slide-in board in all year round.
    Last edited by oldfordguy; 06-08-2015 at 10:05 AM. Reason: additions and clarifications

  8. #87
    Join Date
    May 2014
    Location
    Kingsport Tn
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    45

    Default Re: Homemade oxalic acid vaporizer

    I have a question for those of you who use a homemade acid vaporizer. Do many bees die from coming in contact with the vaporizer? Also, have you ever had a queen come in contact with it? Are you just taking the risk that the queen is not close by when you slide it in? Any danger of catching the hive on fire with all the heat?

  9. #88
    Join Date
    Aug 2013
    Location
    Bolton, Ontario, Canada
    Posts
    281

    Default Re: Homemade oxalic acid vaporizer

    You may get a very small handful of curious bees get killed. I have not lost a queen let or many bees for that matter. If you run screed bottom boards you can put the vaporizer below the screen if you enter it from the back of the hive. I have mine rigged to enter the back of the hive with the slid out Board slid in. And the vapourizer under the screen. For my solid bottom bottom board hives I go in from the front. No real problem at all.

  10. #89
    Join Date
    May 2011
    Location
    Algoma District Northern Ontario, Canada
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    4,749

    Default Re: Homemade oxalic acid vaporizer

    I smoke hard into the bottom entrance, quickly rake out the ladder comb under center two or three frames and push in the vaporizer. The queen bee would likely be the first one to run up the frames if she were in the bottom. You will kill a few bees but not as many as you would squish when stacking off and on to do an inspection
    Frank

  11. #90
    Join Date
    Sep 2013
    Location
    Evansville, IN
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    47

    Default Re: Homemade oxalic acid vaporizer

    I use SBB, I know I can't use the white plastic cardboard to seal off the vapors, because it will most likely burn. My slot is very narrow - I have a piece of 1/4 plywood, but I can't get it in the slot. I looked at the hardware store and they have sheets of silver stuff in the stove pipe aisle. I'm guessing it's made of the same stuff as stove pipe??? It's very thin and would fit. My question is do you think I could use it to close off the bottom while I vaporize? Or will that sheet heat up and over heat my hive. Sorry this is not clear as to what this sheet of metal at Menard's is made of.

  12. #91
    Join Date
    Nov 2009
    Location
    Manning, SC
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    5,198

    Default Re: Homemade oxalic acid vaporizer

    Mimzy,
    If it is stovepipe material, you're fine. Aluminum flashing works well also. You do not have to have a perfect fit, but you want to close off the openings of size.
    http://OxaVap.com Your source for the ProVap 110
    OA Vaporizer. The fastest vaporizer on the market!

  13. #92
    Join Date
    May 2011
    Location
    Algoma District Northern Ontario, Canada
    Posts
    4,749

    Default Re: Homemade oxalic acid vaporizer

    Make a pair of tapered shims by cutting a piece of 3/4 x 3/4 wood 20" long, diagonally from end to end. Lift and separate the front of your hive from its bottom board and slip one of the resulting wedges under each side. Your front entrance is now about 5/8" higher opening. The first vaporizor I made a bit on the tall side needed this trick to fit in.

    Similar pieces can also be used to instantly create additional entrances anywhere between boxes or under a top cover. I have a bunch of them precut. They will also create an instant hive bottom on any flat surface.
    Frank

  14. #93
    Join Date
    Nov 2009
    Location
    Manning, SC
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    5,198

    Default Re: Homemade oxalic acid vaporizer

    Remember, if your BB opening is to small for the vap, you can always vap from the top down! Just make a two inch or so shim the size of the hive body, cut a slot in it for the vap, place the vap with OA on the top bars (you may want to place a small piece of wood or sheeting under it) cover with the top cover and vaporize. You can use the plastic or ??? to cover the screen bottom board if you have one. Quick and simple .....
    http://OxaVap.com Your source for the ProVap 110
    OA Vaporizer. The fastest vaporizer on the market!

  15. #94
    Join Date
    Jun 2015
    Location
    Deep Brook, NS, Canada
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    584

    Default Re: Homemade oxalic acid vaporizer

    You can also use a hive tool to raise the box off the SBB while you slide the vaporizer into the hive. It will then rest on the screen, and won't burn the plastic.
    A long term approach might be to build up your SBBs so you can slide the vaporizer into the bottom entrance.
    I want bees that make up for my mistakes.

  16. #95
    Join Date
    Apr 2014
    Location
    Saint Albans, WV
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    24

    Default Re: Homemade oxalic acid vaporizer

    I recently made a vaporizer out of bar stock aluminum and aluminum rod... I used 12 gauge braided wire but it is getting really hot and I don't want to mess anything up... What kind of wire are you all using and should it be getting hot?

  17. #96
    Join Date
    Jul 2015
    Location
    Raiford, Florida
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    172

    Default Re: Homemade oxalic acid vaporizer

    This is very inexpensive to make your own, and the time to vaporize 2 grams is 2 minutes. Make your own.
    http://www.ebay.com/itm/Mini-Portabl...item1ea1bcfa04
    Last edited by my2cents; 07-31-2015 at 10:44 AM.
    I will bless (Praise) the Lord at all times: his praise shall continually be in my mouth.

  18. #97
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    Apr 2015
    Location
    Sonoma County, Ca, USA
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    457

    Default Re: Homemade oxalic acid vaporizer

    Dang, how big is the pan on yours that it holds 2 OZ of OA ?

  19. #98
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    Jul 2015
    Location
    Raiford, Florida
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    172

    Default Re: Homemade oxalic acid vaporizer

    Quote Originally Posted by BeeBop View Post
    Dang, how big is the pan on yours that it holds 2 OZ of OA ?
    Dang auto correct, LOL - no, wasn't paying attention.
    I will bless (Praise) the Lord at all times: his praise shall continually be in my mouth.

  20. #99
    Join Date
    Sep 2013
    Location
    Evansville, IN
    Posts
    47

    Default Re: Homemade oxalic acid vaporizer

    I know you're supposed to take honey supers off before the treatment. I have two hives that are new this year, so I left them on so the bees could have the honey later on. I do want to know what does the OA do to the honey. Does it poison it for human consumption, or does it make it taste weird or what. Someone is going to ask me this question and I want to know the correct answer.

  21. #100
    Join Date
    Nov 2012
    Location
    Springfield, Ohio, USA
    Posts
    641

    Default Re: Homemade oxalic acid vaporizer

    Quote Originally Posted by Mimzy View Post
    I know you're supposed to take honey supers off before the treatment. I have two hives that are new this year, so I left them on so the bees could have the honey later on. I do want to know what does the OA do to the honey. Does it poison it for human consumption, or does it make it taste weird or what. Someone is going to ask me this question and I want to know the correct answer.
    I know that folk say that oxalic acid is found naturally, but the truth is that you can get pretty sick from eating some plants that contain it (rhubarb leaves, for example). I don't know the levels that are found in natural (yet hazardous) sources, nor do I know the levels that would be left on honey supers after treatment.

    The OSHA PEL (permissible exposure limit) for oxalic acid is 1 mg/cubic meter, compared to 5 mg/cubic meter for cyanide. Although general exposure isn't the same as ingestion, I'd hazard a guess that it is the possibility of poisoning that leads to the recommendation to remove the honey supers.
    Pete. New 2013, 12 hives, zone 6a
    To study and not think is a waste. To think and not study is dangerous.

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