[Clayton Huestis]

Anyone have an info for breeding for nosema tolerant bees? Only place I have seen that is working in this direction is Olympic Wilderness Apiaries. But they don’t say exactly what they are doing???

 

[GregV]

I am pretty sure "nosema tolerant bees" are about the same as "winter-hardy bees".
They overlap by a lot.
Especially so because vast (most?) number of diarrhea cases are actually about being able to hold the poop for a long time or about not filling the guts with the poop during the bad timing.
Not really about nosema.

 

[Michael Palmer]

select breeding stock from colonies that come through the winter with strong clusters. Over time....

 

[Michael Bush]

Studies on breeding for Nosema resistance:

https://www.apidologie.org/articles...3/Apidologie_0044-8435_1999_30_5_ART0003.html

http://www.dbpia.co.kr/Journal/ArticleDetail/NODE00954536