Deformed wing virus

[HJBee]

Hi Jon, we have never seen a mite count like this in any of the hives in may, so why I treated now (used beebase calculator & decided was not worth the risk to wait). Will treat with Apivar in early Sept as usual (as I did last year) this one hive is just very different to the rest. H

[mbc]

treat with Apivar in early Sept as usual (as I did last year) this one hive is just very different to the rest. H

Sounds like you might have amitras resistant mites, unless this one colony was subject to a lot of varroa re invasion since the last treatment.