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  1. #1
    Join Date
    Jul 2010
    Location
    Auckland,Auckland,New Zealand
    Posts
    5,857

    Default Formic Acid 24 Hour Fumigator

    In response to another thread, I'm starting this one about an application method for Formic Acid. Here's a link from the developers

    http://www.wvu.edu/~agexten/varroa/FormicAcid.pdf

    I've been using this method myself and it works pretty much as described, costs me something around 50 cents a treatment. I don't use the HBH, but when using the fumigator I put 1/2 drop lemongrass in the mix, which reduces queen loss right down, in my case, to zero.

  2. #2
    Join Date
    Jun 2010
    Location
    TORONTO,ON. CANADA
    Posts
    174

    Default Re: Formic Acid 24 Hour Fumigator

    Oldtimer,
    Had this article, together with few others, as FA treatment would be my first choice for varoa treatment.
    Feel more confident to use this method, when you already successfully used it. Thanks
    ==Northumberland County Beekeeper, Trent Hills, Ontario==

  3. #3
    Join Date
    Nov 2009
    Location
    Louisburg, NC
    Posts
    50

    Default Re: Formic Acid 24 Hour Fumigator

    I made 24 of the fumigator boards this summer. I used them in HOT weather as tthe temps would not moderate - all over 90 F. I am very pleased with the results. I used HBH but am interested in the lemongrass oil too. I did alcohol washes before and after fumigations and had very good results. One thing I did that helped a lot was to replace all of my screened bottom boards with solid bottoms with tight fitting entrance reducers. I was having problems getting any sort of fumigation (thymol) with screened bottoms that I was trying to seal. I think the formic fumigators work in 2-3 hours to be honest, but am curious what others think. I did have trouble locating formic but finally had a 5 gal bucket shipped (90%) and used the hydrometer method to cut it to 50%. I would recommend this treatment to anyone.

  4. #4
    Join Date
    Jul 2010
    Location
    Auckland,Auckland,New Zealand
    Posts
    5,857

    Default Re: Formic Acid 24 Hour Fumigator

    Quote Originally Posted by wglord View Post
    One thing I did that helped a lot was to replace all of my screened bottom boards with solid bottoms with tight fitting entrance reducers.
    Yes very important point, FA vapor is heavier than air and will just flow straight out. A lot of people using FA don't have success because they don't realise this.

  5. #5
    Join Date
    Feb 2006
    Location
    Herrick, SD USA
    Posts
    4,312

    Default Re: Formic Acid 24 Hour Fumigator

    I have had fairly good results using it on pads but its pretty nasty stuff to handle. Have you found that it causes metal nails, staples, etc. to rust?

  6. #6
    Join Date
    Jul 2010
    Location
    Auckland,Auckland,New Zealand
    Posts
    5,857

    Default Re: Formic Acid 24 Hour Fumigator

    Yes it can.

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