Parasytic mite syndrome vs sac brood vs sac brood?!
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  1. #1
    Join Date
    Mar 2018
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    Monterrey, Mexico
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    28

    Default Parasytic mite syndrome vs sac brood vs sac brood?!

    Hello fellow beeks,
    Could someone explain the difference in symptoms and look of parasytic mite syndrom, sac brood and chalk brood? What are the causes of each and how could they be treated? I'm having a really hard time when diagnose them.
    Cheers!
    F.

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  3. #2
    Join Date
    Sep 2008
    Location
    Mtn. View, Arkansas, USA
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    2,754

    Default Re: Parasytic mite syndrome vs sac brood vs sac brood?!

    Sacbrood is caused by a virus, Chalkbrood is caused by a fungus, and I know of no treatments that can be given to combat them. Strong colonies headed by hygienic queens , in full sun, and on stands that puts the colony 6 to 8 inches above any damp grass or earth are good management techniques that help prevent both diseases.

    Both of these diseases kill the brood in the same stage, when the larva has been capped, is laying out straight in the cell, but has not changed into the pupal form.

    Chalkbrood causes the dead prepupa to become chalky white, with the head dark. The fungus grows and the dead prepupa swells and fills the cell, and then dries into a "mummy" that will turn a grayish black. The "mummy" is hard, and the bees remove them and dump them the hive entrance.

    Sacbrood turns straw colored when the prepupa first dies, then it turns brown and the skin forms a water filled sack that is tough enough that the prepupa can be removed from the cell. The head of the prepupa will be turned up, and will be darker than the rest of the prepupa.


    The Bee Parasitic Mite Syndrome causes brood to die in all stages, and in my colonies, all stages were present at the same time. Dead larvae in the C stage will look like EFB, dead prepupa will look like AFB but will not rope out when stirred with a stick, and there will be dead pupa in all eye color stages. The colony will have high mite counts and mite poop will be seen in many brood cells. Dead pupa in the colored eye stage is a clue you can't miss, this is not present in Sac or Chalkbrood, or in AFB.
    42 + years - 24 colonies - IPM disciple - Naturally Skeptic

  4. #3
    Join Date
    Nov 2014
    Location
    Portugal
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    Default Re: Parasytic mite syndrome vs sac brood vs sac brood?!

    Quote Originally Posted by AR Beekeeper View Post
    The Bee Parasitic Mite Syndrome causes brood to die in all stages, and in my colonies, all stages were present at the same time. Dead larvae in the C stage will look like EFB, dead prepupa will look like AFB but will not rope out when stirred with a stick, and there will be dead pupa in all eye color stages. The colony will have high mite counts and mite poop will be seen in many brood cells. Dead pupa in the colored eye stage is a clue you cant miss, this is not present in Sac or Chalkbrood, or in AFB.

  5. #4
    Join Date
    Mar 2018
    Location
    Monterrey, Mexico
    Posts
    28

    Default Re: Parasytic mite syndrome vs sac brood vs sac brood?!

    OK! Ill keep it in mind! Thanks a lot!

  6. #5
    Join Date
    Aug 2011
    Location
    KC, MO, USA
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    4,646

    Default Re: Parasytic mite syndrome vs sac brood vs sac brood?!

    Here's a few guides to get you started;

    https://extension.psu.edu/downloadab...sample_id/825/

    http://www.utahcountybeekeepers.org/...%20Article.pdf

    The first thing I would rule out using these guides is mites and EFB. These are the most common diseases found here on bee source, most of the time when a beekeeper thinks it is sac brood or caulk brood it turned out to be EFB with lab confirmation.

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