Bill,

Your summary is great. It shows that there are variation in OA treatment results based on geographical regions, bee seasonality, brood production, etc. Every reported research was based on the purpose of the test and where was it done. These reported results must take in consideration the other variable before generalization.



When Dr Dewey Caron wrote varroa management for the bee health collation, a group of us had good discussions how to reflect these variables in the document. Dewey split the bee season as building up time (spring). Honey production, and slower growth season indicating fall. Thus, we can avoid calendar dates.

Many people involved in the revisions including me to ensure the info applicable to  USA 🇺🇸 and Canada 🇨🇦. As these two countries extend from coast to coast to coast including many climatic conditions from subtropical to freezing winters.



The concept is valid and can be applied to any region around the world taken in consideration bee seasonally.



For more info, I encourage beekeepers to check this document.



http://honeybeehealthcoalition.org/varroa/





Medhat Nasr

Alberta Canada



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