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varroa strips and oxalic?

Discussion in 'Disease & Pests' started by Ahol, Feb 17, 2017.

  1. Ahol

    Ahol Nu Bee Beginner

    Hi all. I noticed a high varroa load in my hive and as I'm after more hives and not honey I put bayvarol strips in and did a mite drop count. I counted over 100 mites dropped in ~14 hours after the strips went in which seems to me to be a shedload. This has got me concerned about the survival of the hive.

    So how fast does bayvarol work - I.e. Should I help my girls out with oxalic vapor (now that it has arrived) and let the strips take care of the varroa in capped cells, or should I just let the strips do their thing?
     
  2. Trevor Gillbanks

    Trevor Gillbanks Field Bee Donor 2016 Semi Commercial Gold Donor '17

    Let the strips do it. 100 is not much for bayvarol
     
    • Agree Agree x 1
  3. Kiwifruiter

    Kiwifruiter Guard Bee Semi Commercial

    I have been told that bayvarol hits hard and kills most of the varroa in the first 48 hours. I would leave it for a week then do a sugar shake/alcohol wash to see if its working....
     
    • Like Like x 1
    • Agree Agree x 1
  4. Rob Stockley

    Rob Stockley Hive Management Hobbyist

    Bayvarol won't kill mites in capped cells. The mites get killed as they come out of cells hence the relatively long treatment time. The initial drop you've noted will be phoretic mites that were on the bees themselves not in cells.
     
  5. tristan

    tristan Field Bee Commercial Gold Donor '17

    how did you notice ?
     
  6. Ahol

    Ahol Nu Bee Beginner

    Bit of sacbrood, DWV, and saw some on the bees and running around
     
  7. M4tt

    M4tt Guard Bee Donor 2016 Semi Commercial Platinum Donor '17

    How big is your hive ?
    From what you describe, 100 mites falling doesn't sound like enough if you can 'see' varroa in the hive

    You should do a sugar shake
     
  8. tristan

    tristan Field Bee Commercial Gold Donor '17

    mites on bees doesn't mean much but sacbrood and DWV does.
    mite checking would be the best thing to do. sugar or alcohol wash.
    you simply could have a large amount of mite resistance to bayvarol, but 14 hours is a little to soon. give it 48hrs then check.
     
  9. Ahol

    Ahol Nu Bee Beginner

    Hive is 2 brood and 1 super, all FD.

    Saw 5 more DWV bees being dragged out of hive today. Will do sugar shake tomorrow if its not raining and report back.
     
    • Thanks Thanks x 1
  10. Ahol

    Ahol Nu Bee Beginner

    Did the sugar shake this evening. From just under a cup of bees I counted 8 varroa.

    Does that seem high? The Bayvarol strips went in on Tuesday evening
     
  11. M4tt

    M4tt Guard Bee Donor 2016 Semi Commercial Platinum Donor '17

    So the standard sugar shake is half a cup, which is easy enough to get if you jiggle / pour the bees into a half cup measure over the top of your open hive .

    So we'll go with a count if 4 to 5.
    Yes, it seems a bit high . I'd like to have seen bayvarol take them out by now.
    Even if they are new varroa out of cells that the bayvarol hasn't yet killed, it still seems high .
    I suspect, but can't be sure, that an alternative treatment would be wise
     
  12. Ahol

    Ahol Nu Bee Beginner

    Thanks, the sugar shake seemed high to me, but wasn't sure.

    Would oxalic vapour be the best? 1 dose now and then check and maybe do again in a week or so if necessary?
     
  13. Trevor Gillbanks

    Trevor Gillbanks Field Bee Donor 2016 Semi Commercial Gold Donor '17

    Minimum of 3 treatments 7 days apart. Then retest.
     
  14. M4tt

    M4tt Guard Bee Donor 2016 Semi Commercial Platinum Donor '17

    With oxalic vapour, you will have a continual problem of varroa hiding safely in capped cells.
    MAQS will kill varroa in brood as well as those on bees.
    Then, maintenance doses of oxalic vapour may work once you've knocked the population back
     
    • Agree Agree x 2
  15. Ahol

    Ahol Nu Bee Beginner

    I treated them with oxalic on Monday evening, as I don't have any MAQS or formic acid. Will do that for 2 more weeks and fingers crossed its all good. Planning to use formic as an autumn treatment on my hives.
     
  16. Tomm

    Tomm Larva Hobbyist

    Are beekeepers still using Apistan.I was going to use it this weekend..after a sugar test?
     

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