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No, I think the suggestion is that the mechanism of action is such that mutations like you describe shouldn’t result in resistance. The analogy in head lice is that the lice develop resistance to various miticides but not to the nit comb.

Again this is Randy’s idea, but he is of the view that the mechanism of action of OA (however applied) is macro enough that it’s less likely to be susceptible to resistance.

Randy's latest research is in. https://scientificbeekeeping.com/7701-2/ He continues to be quite bulish. My results this year were zero spring mite counts (1 alcohol wash and 2 sugar washes) accross 3 top bar colonies that had OA strips from Nov to March.

I like especially: The rambling threads that go off topic - it's like a dinner table conversation sometimes. The lack of 'use the search button' police. The self organising master, journeyman, apprentice structure; I know it's not fool proof but the new-bee to queen-bee 'rankings' perhaps help...

but might it stop them wanting?

I think most doctors would respond to ‘ok, why is that?’ pretty reasonably. I’m just wondering if mid immunotherapy risks rise beyond your current baseline (I don’t know this, but the immune system is very idiosyncratic). Regards (Dr) BIAB.

Have they underflown the entrance and then got confused by the pheremones comiing from the OMF. If it's non-trivial I think the advice is to prevent the underflying by hanging a skirt of somesort from below the entrance .

Drex/Simon - why do you do it? Is it to boost the ultimate coloney size or to try an head off swarm impulse (or a bit of both)?

there must be a follow up to that tale - did you ever go back?

Reviewing my sources - it might be a recomendation meant for warmer climes.

I've heard this is a good thing to do in a long hive - as a way of preventing (or delaying) swarm impulse. Is that correct? I ask as I spread the brood on a pretty busy coloney 2 weeks ago and just been in today to find they have abandoned one of the brood combs - I assume I over did it. Neil

It was about 4.00 and no big flow flyign goign on. But there were a few comb fallers on the hive walls which I couldn't devise a method to get at- it's them more than the flyers I'm thinking of. Should I close the old hive up (to stop the flyers moved to their new home returnign to their old...

Truth is 'it's complictaed' and esoteric. Some people seem to actually benefit form their stings. Some seem to desensitise as a result of stings others develop sensitivity.

Eventful 10 days. 15th went, all ready, to pinch the 'nasty coloney' queen but going thorugh the nuc I'd planned to unite them with I dropped their (the nuc's) queen on the floor - quick scrabble thorugh the ivy on the floor and no sign. I stood around for a few minutes as I've heard they can...

Is this why your swarm traps are so succesful?

Only if they have this. Almost none of us here do. Where in Kent are you?

Is it not possible that what’s happening is you are preserving desirable phenotypes over and over - without necessarily having much impact on the local gene pool. Nothing wrong with this I’d suggest, but successful local bee rearing (which I’m trying to do in a small way myself) may not be much...

None found. My invite had been intended for Apiarisint - my error.;)

This is completely true and was the point of my own post. I'd have 2 Miss Canters for 1 Mr Parry.

Marvelous thread. (No irony intended)