On Mon, Jan 30, 2017 at 5:35 PM, Peter Borst <[log in to unmask]>
wrote:

>
>   should be avoided at all costs.
>

I agree,

I've gotten  angry even when inspection wants to rip apart hives at the
wrong time when
burr comb filled with honey gets ripped apart .

Leave them alone and just MANAGE them properly up to winter.

I personally know some who used  OAV and the outcome was questionable most
of the time with queen loss
on occasion. A waste of time and effort by them.

The cluster has to be broken for efficacy such that deposition of the
sublimated particles
is evenly spread.
I've refuse to use OA period.  In my case I believe in management
throughout always;
starting with good genetics.  In fact no formic either.  (Russian stock ,
pure and hybrid)
I've had great success. MANAGEMENT!

At a meeting Medhat years ago presented facts and figures about applying OA
vapours.
If I recall correctly, the quantity in grams,  the temperature of the
vapour and the rate at which it was introduced
to disperse the colony were key factors.
Change any one of the three and  efficacy goes out the window.

Either way,IMHO a waste of time and money.


Walter
littlewolfapiaries.com

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