What are these black granules on my bottom board?
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  1. #1
    Join Date
    Feb 2020
    Location
    Canton, Ohio
    Posts
    42

    Default What are these black granules on my bottom board?

    IMG_20200329_163623.jpg I have seen wax moth droppings but I think this is something different. Its only in that one very centralized area. I thought it might even be an area of dark comb the bees started chewing on. Seems like it might be something more sinister though... Any thoughts? This is from my healthiest hive as well which seems odd if it is something undesirable.

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  3. #2
    Join Date
    May 2017
    Location
    Spokane County, Washington, USA
    Posts
    365

    Default Re: What are these black granules on my bottom board?

    I am guessing it is old pollen they are removing from the comb.
    So then, as we have opportunity, let us do good to everyone, and especially to those who are of the household of faith.

  4. #3
    Join Date
    Apr 2017
    Location
    Aylett, Virginia
    Posts
    5,008

    Default Re: What are these black granules on my bottom board?

    Hard to tell from photo but it could be larvae poop. Before a larva is capped, it poops. Does that spot correspond to an area of brood above it?
    Thankfully, the bees are smarter than I am. They are doing well, in spite of my efforts to help them.

  5. #4
    Join Date
    May 2009
    Location
    Grand Rapids MI USA
    Posts
    1,649

    Default Re: What are these black granules on my bottom board?

    Check for chew marks in the comb. Bees’ll chew on it if they’re chasing pests around.
    Rod

  6. #5
    Join Date
    Sep 2008
    Location
    Mtn. View, Arkansas, USA
    Posts
    2,816

    Default Re: What are these black granules on my bottom board?

    I can't tell from the photo if it is powdery or is adhering to the bottom. If powdery it probably is debris from the bees chewing out cells, if it adheres it could be a starting of mildew.
    42 + years - 24 colonies - IPM disciple - Naturally Skeptic

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