On 1-Dec-09, at 10:29 PM, Bob Harrison wrote:

>> I keep no *dinks* this time of year but many will say not to hit a  
>> small
> hive with OA as can cause winterkill. I do not know and simply  
> passing on
> what northern beeks have told me.

I believe that 5ml  per seam will handle all hives.  50ml per hive  
will cover most hives less for smaller  more for large doubles or  
triples
>
> All OA is to me is a treatment to supplement my fall treatment. To Dr.
> Marion Ellis perhaps a method to control varroa by itself.

I use formic followed by oxalic in the fall only.  I do no varroa  
treatments in the spring(except the odd hive with high mite counts)  
when the bees are building up.  I consider oxalic applied in early  
December, therefore, to be an early spring treatment
>
> I agree with Waldig that timing is very important. When a hive is  
> broodless
> the number of dead varroa is impressive! I have never killed a hive or
> knocked the hive back with an OA treatment of a broodless hive.

I'm glad that you brought this up Bob, as I have always believed that  
the reason for broodless was oxalic could not penetrate the cappings  
thus many mites would be missed and efficacy would be reduced  
significantly
>
>
Bob Darrell
Caledon Ontario
Canada
44N80W

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