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JohnF

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JohnF last won the day on August 4 2015

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About JohnF

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    House Bee

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  • Business name
    dnature diagnostics & research Ltd
  • DECA Holder
    Yes
  • Beekeeping Experience
    Bee Research
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    dnatured

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    Gisborne

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  1. https://www.ncbi.nlm.nih.gov/pubmed/26412538 and https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5186740/ (open access . . oh, the irony)
  2. By 'beneficial', you mean to the bees Alastair ? Yes, oxalic acid has been shown to knock down Nosema ceranae from memory . . . will have to find the paper. Not sure how it was administered to the bees but it memory again says via syrup (dribble). I also seem to recall a paper that compared dribble vs vapourisation.
  3. 😘 I can't interpret that emoji - my eyes are fading.
  4. This thread gets away on me so I’m late to comment. Time for a pop quiz (you’ll tell me if any of this is wrong James) - dwindling hives - queen right - low/ no brood - stores on board - varroa control not likely the issue . . . . sounds like . . . ?
  5. I don't know if the results were published or not - but yes, same thing. Heating combs at 50deg C for 90 mins reduced pathogen loads and meant more brood and increased numbers compared to reusing the combs without heating. Last time I heated a box of combs, it worked well when reusing them - but since my wife isn't away like last time, I cant dismantle the oven to jam in a dozen or so (need to watch temp carefully!) - so the combs went on a fire pile
  6. Hmm, not sure on that Dave . . we can see high apis in bees/colony that is not going backward - or a hive that had a reduced/no crop . .its more when we see high ceranae that there are hive issues and when we follow up on high ceranae *and* apis samples, usually the hive has collapsed if left alone Randy Oliver mentioned at conference last year that the dysentery (ascribed to nosema apis, not ceranae as Goran says) was actually caused by a yeast he'd been told. I haven't seen anything about that (should follow up with him) but yes, we can detect high apis or ceranae levels with nothing on the front of the hive
  7. Almost impossible to differentiate with microscopy. I think @Dave Black had worked on it. If I had to put money on it, given the differing shapes (some longer and thinner) then I'd say you had both n=1 But yes, if detected early then not necessarily a death sentence. I knew my one was weak but wasps hit it
  8. Rapid hive dwindling - Cororapa. Unlike what @Goran mentioned with overseas, here we can see apis, ceranae or both. And as above, its twice as bad when its both
  9. Perhaps mark those frames for a heat treatment Nikki? I just lost a hive thanks to spring dwindling (ie nosemas) - finished off by wasps. We’ve seen quite a bit nosemas - both ceranae and apis together (= twice as bad!) - this spring.
  10. Ahh . .because AFB is not present in every hive . . . ?
  11. Yes, sorry @Goran - a bit abrupt there. I think its more 'what studies are there that suggest AFB is in every hive' ? This is a dogma that I and others have heard repeatedly - and there is no evidence to suggest that is so. We hope to publish our work in the near future Given our hive density @Daley then we could have expected our AFB frequency to be the highest ! And yet, we don't see it
  12. No. It isn’t. Most hives have no trace of AFB
  13. Ahh, so is much of people's beekeeping? Otherwise you tick yourself as 'hobbiest' here
  14. Ha ha, true Tristan ! D’oh - didn’t check the date
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