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  1. #1
    Join Date
    May 2009
    Location
    San Ramon, CA USA
    Posts
    26

    Default Need a Thymol Liquid Recipe for Varroa

    I bought a 1 oz. bottle of thymol solution on amazon.com. I've realized now that all the recipes call for thymol crystals, not thymol itself. I've noticed mites in my hive and have seen bees outside with mites attached to them. I want to treat them before it spirals out of control (if it hasn't already). What's a recipe for this liquid? I don't want to mess things up by adding too much thymol in the crisco. I only have one hive. This stuff smells pretty strong, and I'm worried that if I put too much it'll kill them all.

    I was thinking of adding one dropper of liquid to maybe one or two crisco sticks, but I really am not sure.

  2. #2
    Join Date
    Aug 2005
    Location
    Fort Wayne, IN
    Posts
    915

    Default Re: Need a Thymol Liquid Recipe for Varroa

    Read scientificbeekeeping.com and then order some MAQS, Apigard, Hopgard, etc.

  3. #3
    Join Date
    Feb 2009
    Location
    Colorado Springs, CO
    Posts
    340

    Default Re: Need a Thymol Liquid Recipe for Varroa

    Maxine,

    Do a search within Bee Forum for the contributor "Alpha6" . He has posted recipes for the use of thymol in winter feed syrup several times in the past. You need to use it after your last harvest of the year. I've used his recipe for years and have very little V-mite problem. I've run four 72 hour mite drop stickey board tests this summer on six colonies and the worst case was 30 mites however most were zero.

    Regards,
    Steve

  4. #4
    Join Date
    Feb 2009
    Location
    Colorado Springs, CO
    Posts
    340

    Default Re: Need a Thymol Liquid Recipe for Varroa

    Maxine,

    Correction on my post #3.

    At the end of the last sentence I ment to say: ...worst case was 30 mites however in most cases it was zero. ...

    Steve

  5. #5
    Join Date
    Aug 2007
    Location
    Fairfield County, Connecticut, USA
    Posts
    3,589

    Default Re: Need a Thymol Liquid Recipe for Varroa

    If you don't know the percentage of thymol in your solution any "recipe" will contain a fair amount of guesswork. If I was treating colonies I would purchase a know product before simply mixing something up...

    Some years back I feed thymolated syrup to my bees following Randy Oliver's directions for diluting the thymol crystals.

    From Randy Oliver's website :

    Thymolated syrup formula

    Update: this strength of thymolated syrup does not appear to control nosema! I am currently undertaking a trial at 3x strength. My current recommendation is to use FumagilB in syrup per label directions.

    OK, here’s how you make the premix. You can use either ethyl or isopropyl alcohol. The cheapest and easiest is 91% isopropyl alcohol from the drug store (70% will also work, but won’t dissolve as much thymol). Isopropyl alcohol is relatively nontoxic to insects, and the small amount won’t hurt your bees. I wouldn’t use denatured ethanol, since they add nasty “ingestion deterrents.” Theoretically, you can dissolve 1g of thymol in 1ml of pure alcohol, but in practice this is difficult, and the solution doesn’t mix well with water.

    What works well is to add 12.5 grams of thymol crystals 88ml of of 91% isopropyl alcohol (total volume = 100ml) (from the drug store, isopropyl alcohol is not harmful to bees at this concentration; 70% works, but not as well; 151 proof Everclear grain alcohol or 160 proof vodka works great, and is less toxic to bees than isopropyl).

    Add 2ml of premix per gallon of syrup (2 tsp per 5 gallons). Slowly pour the premix into the hot water that you’re using to mix syrup (watch the fumes) and stir vigorously until thoroughly mixed. Note that thymol sinks in alcohol, but floats in water, and will rise to the surface of the syrup until it is thoroughly dissolved by stirring. The premix can also be added to the bottom of a tank as you fill it with warm HFCS. Caution: you should always wear nitrile gloves when handling thymol, if for nothing else, to remind you not to rub your eyes! If you do get it on your skin, wash it off with warm water—cold water won’t dissolve it.

    OK, OK, I’ll do even more math for you, in order to help you to avoid mistakes. Here’s a really simple way of making the premix. Take a 1 pint (473ml) bottle of 91% alcohol, mark the fill level, then pour the alcohol out. Then weigh 59g of thymol crystals, and pour them carefully into the empty bottle. Then pour about three quarters of the alcohol back in, recap, and shake until the alcohol’s dissolved. Then top off back the the original fill level with alcohol. You now have a bottle of premix that will thymolate (dontcha just love the sound of that word?) 236 gallons of syrup. Similarly for a liter bottle, put in 125g thymol, and top off to 1 liter with alcohol. For God’s sake, immediately relabel the bottle so that no one rubs it on their skin (I guarantee you, they’re not gonna drink it)! Any of these premixes can be added at the rate of 2ml per gallon of syrup.
    BeeCurious
    Trying to think inside the box...

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