Re: Fall varroa treatment
OAV has been used by some in Alberta for 10-15 years. Think OAV has been used in Europe for around 20 years. It is very effective to control mites. Three treatments 7 days apart is the minimum. You may have to do more than 3 treatments.
Originally Posted by Maybee Apiaries
My understanding is Medhat Nasr recommends Apivar for spring treatment and OAV for fall treatment. Need 1 strip of Apivar per five deep frames of bees so likely need less strips in spring and hence lower cost when done in spring. Rotating between Apivar and OAV will help mitigate resistance build up.
Just saw an email this week from Medhat stating that no resistance to Apivar has been found in lab tests in samples they have submitted from Alberta.
How many hives are you running? Maybe you need the vm Vaporizer? There is an active thread and you can google it.
If you always do what you always did, you'll always get what you always got!