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I don't think 1% in August is realistic.
OMAFRA's recommended thresholds in Ontario are 3% or 9/300 bees(
http://www.omafra.gov.on.ca/english/food/inspection/bees/2014-treatment.htm).
From my experience, that threshold is probably ok in late August here, but
too high in early August, I am treating at 2% or higher in early August.
We treat primarily with MAQS through the season with a fall cleanup with
OA. I find with MAQS that it seems to work pretty well as long as mites
are in the 6% or less, above that it seems to be struggle. Here are some
mite numbers and a treatment schedule for a yard of 25 hives that I have
been struggling with all season:
May 16 - tested 3 hives - 0.4%/1%/1.8%
May 28 - treated with 1 strip MAQS
June 9 - treated with 1 strip MAQS
June 27 - tested 4 hives - 1.5%/4.2%/4.4%/7.4%
July 24 - treated with 2 strip MAQS
Aug 15 - tested 3 hives - 1.8%/0%/5%
Aug 15 - treated with 1 strip MAQS
Haven't been back to follow up on the last treatment, but figure it is
probably in decent shape now.
Adam
Barrie, ON
On Mon, Aug 29, 2016 at 2:03 PM, Charles Linder <[log in to unmask]>
wrote:
> I was ready Jennifer Berrys article in BC today at lunch. In it were a
> couple of things I questioned, probably just not quite getting what she
> was driving at, but one stuck out in my mind as completely off. (it may
> not be but posing the thought here)
>
> The statement she made was that the economic threshold for mites in late
> summer is 1% (3 per 300 wash) That seems completely off to me. I would
> be tickled to see 3's in my mite washed this time of year, While I
> understand a 3 in April would be bad. Not comprehending how a level of 1%
> in aug is a bad number???
>
>
> Any thoughts??
>
> Charles
>
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