This lecture, by Flemming, was entitled: ‘The Varroa Mite – an interesting creature.’ My note reads: “Lights out for presentation – darker than the dormitory at night! Therefore no notes and I nodded a lot.”
I did, however, note that the Danes cope with the mite by drone brood removal in Spring, an application of formic acid (60% as I recall) in Summer after the supers are off, and a Winter treatment with oxalic acid. I don’t remember why thymol isn’t included in the range of treatments; maybe Flemming, who has just joined the Beekeepers of Ireland Facebook group and thus see this, will enlighten us.
Varroa Jacobsoni (which ours was mistakenly thought to be) and Apis ceranae have a stable host: parasite relationship but our western honeybee, Apis mellifera has no defence. Apis ceranae has small bees and small colonies.
I don’t recall ever reading what the natural relationship is between Varroa destructor and its natural host, which I assume to be a strain of Apis ceranae. Can anybody point me (and other readers) towards an answer?