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  1. #1
    Join Date
    Aug 2008
    Location
    ashland,ky,usa
    Posts
    58

    Default oxalic vaporizor

    I just made one out of pipe with a stainless plug. I am going to treat 1 hive with 3 deeps and 1 shallow super (I combined 2 hives). My question is how much acid do I put in the plug to be heated with the torch. And do I just do it 1 time?

  2. #2
    Join Date
    Sep 2004
    Location
    Devils Lake, North Dakota
    Posts
    9,183

  3. #3
    Join Date
    Aug 2008
    Location
    ashland,ky,usa
    Posts
    58

    Default

    That site does not really answer my question.Was hoping someone with experience with homemade version could answer

  4. #4
    Join Date
    Sep 2004
    Location
    Devils Lake, North Dakota
    Posts
    9,183

    Default

    You asked for dosing.......... there is a pretty darn
    good chart with important dose info. Regardless
    of the method of sublimation.

  5. #5
    Join Date
    Aug 2008
    Location
    ashland,ky,usa
    Posts
    58

    Default

    Not sure how to measure in grams

  6. #6
    Join Date
    Apr 2005
    Location
    College Station, Texas
    Posts
    6,985

    Default

    you need a fairly accurate scale which you can (after measuring one sample) convert into a volume if you are doing multiple treatments. I use a very small measuring spoon for the latter part of this process.

  7. #7
    Join Date
    Apr 2007
    Location
    Pike, Pennsylvania, USA
    Posts
    296

    Default what I've heard

    I've just ordered an electric vaporizer which I should be receiving soon. I observed someone using the method you are describing with a sort of home made vaporizer. he used 1 gram per brood chamber or 1/4 teaspoon but mentioned not exceeding 2 grams per hive regardless. when applying heat make sure you go on and off because it is very easy to overheat the acid. since you are going to be so close to the hive be careful of the vapors

  8. #8
    Join Date
    May 2003
    Location
    Lexington, KY, USA
    Posts
    504

    Default Oxalic acid

    Hi, it might help to know that a US quarter weighs 5 grams. Take care and have fun

  9. #9
    Join Date
    Oct 2007
    Location
    VENTURA, California, USA
    Posts
    3,637

    Thumbs Up Ohaus scale.

    http://www.scalesgalore.com/o3bdial.htm
    Locate someone taking a chemisty class and mass, weigh, the desired amount.
    Try using a food measuring set to match the Oxalic acid.
    I have an Ohaus scale. But, I do not have the Oxalic acid on hand to help you. Well, that's 50% of your answer.
    I may be trying out the oxalic acid later so that I could give you the accurate measurement.
    Please remember that different powders will have different weights per unit volume.
    Regards,
    Ernie
    Ernie
    My websitehttp://bees4u.com/

  10. #10
    Join Date
    Dec 2007
    Location
    Ludington, Michigan
    Posts
    611

    Default

    This is a copy of a email that I received from Heilyser company in BC Canada. They sell the 12volt evaporator


    I have some questions on the vaporizer
    1. Can I just use woodbleach in it.
    Yes, as long as it a crystal form and says “Oxalic Acid” on the label. See the attached picture.

    2. What is the weight in grams used per hive both one and two story deeps? Also 5 frame nuc's
    One and two story hive (from 10 up to 20 frames) 2grams oxalic acid. 5 frame nuc 1gram OA; exact instructions coming with each Vaporizer.

    3. I am looking for something that can be used 2 -3 times a year. Can it be used with honey supers on?
    Evaporated OA can be used as often as necessary 7 days apart. Liquid OA should be used only one time per bee generation.

    OA is a natural ingredient of honey but I would not recommend the treatment with a honey super on.

  11. #11
    Join Date
    Jul 2007
    Location
    Brevard county Fla
    Posts
    46

    Default

    I also made one, but have not used it yet. When I researched and asked the same question I was told that a 1/2 inch copper pipe cap full was about the correct amount.
    Regards
    Mike

  12. #12
    Join Date
    Aug 2008
    Location
    ashland,ky,usa
    Posts
    58

    Default

    Thanks to all that replied I appreciate all the help. I will do this tomarrow morning with gloves and respirator. I will use a little over 1/4th of a teaspoon for 3 deeps and a shallow super. I could not do it today, the girls were ticked off when I removed the top feeder, they werent taking much anyway. one of them nailed me in the hind end!

  13. #13
    Join Date
    Sep 2005
    Location
    Red Bluff, Ca
    Posts
    299

    Default

    I was told that a 1/2 inch copper pipe cap full was about the correct amount.

    That is what came with mine they put a handle on it.
    Dan

  14. #14
    Join Date
    Dec 2007
    Location
    Ludington, Michigan
    Posts
    611

    Default correct measurment

    Try calling your local waste water treatment plant and ask if they would be willing to weigh it for you. You could take the copper pipe cap and a teaspoon with you and measure then pour it out on to there scale.

  15. #15
    Join Date
    Oct 2008
    Location
    MASCOTTE, FL. USA
    Posts
    10

    Default

    An unworn penny minted after 1982 is 2.5 grams. Using a gram balance beam scale I have, just over 1/2 tsp = the penny. This was DAP wood bleach. A real pain to measure due to the sesitivity of the scale. 2 grams is recomended for 2 deeps. With that many hive body's, I think I would use a little more than a 1/4 tsp.
    Incidently, mine is all copper 1/2". Using MAPP gas and a swirl head torch. Bench tests show it starting to gas in 15 seconds and complete at 1 min. 10 secs. using appx. 2 grams.

  16. #16
    Join Date
    Nov 2004
    Location
    West Newton, Pa.
    Posts
    916

    Default

    I've used a level 1/2 tsp for 2 deep hive bodies for the last 3 years with no detrimental effects that I could see. I use it in the fall after I've confirmed that there is no brood in the hives. The hives begin the spring with very low mite counts.
    Be Yourself, Everyone Else Is Taken!

  17. #17
    Join Date
    Oct 2008
    Location
    MASCOTTE, FL. USA
    Posts
    10

    Default

    --------------------------------------------------------------------------------

    "I've used a level 1/2 tsp for 2 deep hive bodies for the last 3 years"
    Thats what I used also for 2 deeps. I think for his 3 deeps and a shallow he should use a little more or it won't be a "succesful" treatment.

  18. #18
    Join Date
    Oct 2007
    Location
    VENTURA, California, USA
    Posts
    3,637

    Default Will the vaporizer fit under--

    Can some one tell me if the vaporizer will fit through the entrance of a hive using the 3/8" bee way space cleats.
    I would like to apply the treatment on bees that are on migratory pallets.
    Thank you,
    Ernie
    Ernie
    My websitehttp://bees4u.com/

  19. #19
    Join Date
    Aug 2002
    Location
    Nehawka, Nebraska USA
    Posts
    43,419

    Default

    >Can some one tell me if the vaporizer will fit through the entrance of a hive using the 3/8" bee way space cleats.

    It does not quite fit through a 3/8" opening.
    Michael Bush bushfarms.com/bees.htm "Everything works if you let it." ThePracticalBeekeeper.com 40y 200h 37yTF

  20. #20
    Join Date
    Oct 2000
    Location
    canada, New Brunswick
    Posts
    95

    Default 3 rd year with oxalic

    I have had good succes with the vaporizer method. It seems to be gentle on bees. THis year mites got away on me so had to start treating early. This week was rhe 5th time I treated. Mites are pretty well had it now. Far as amount of oxalic acid i use it really depends on how tiight hive and how tall. The three shallow boxes get 2 vaporizers at same time. I always fill the tray on the vaporizers. Has anyone had some bad effects with large amounts of oxalic use on hives over time.
    Bob F Seaman

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