SkaneBees · Skåne, SE · Pests & Disease · Oct 25, 2026
How long do mites survive in a dead-out, and is comb from a varroa collapse safe to give to another colony?
Skåne, eight years. I've got the boxes from a colony that collapsed in September sitting in my shed — properly diagnosed as far as I can tell, heavy mite load, deformed wings, dwindled to nothing. There are eight frames of decent sealed stores in there and I have two colonies that could use them.
The question I can't find a confident answer to. Varroa can't live long off bees — everything I've read says days rather than weeks,. So logically, comb that has been sitting in a cold shed for six weeks holds no live mites and giving those store frames to another colony transfers nothing but honey.
Where I'm less sure. The viruses. DWV is transmitted by mites and between bees, and I don't know how long virus particles persist in comb. And there's a general principle I keep hearing that comb from any dead-out you didn't fully diagnose should be treated with suspicion, which is fair but tells me nothing specific.
So: do the experienced people here reuse store frames from a varroa collapse? And is there a case for rendering the lot and not thinking about it again?
#varroa#dead-out#comb-reuse#dwv
▲ 11 votes💬 4 replies✅ Solved
4 replies
ImkerinLena · Oct 25, 2026 · ✅ Accepted answer
Your reasoning is sound. Varroa cannot survive long without bees and without brood they cannot reproduce, so after weeks in a cold shed the frames hold no live mites. On viruses: the main transmission routes are mites and bee-to-bee contact, and reusing stores from a varroa collapse is widely done without trouble. Freeze for 48 hours — that's for wax moth, and it also settles the question of anything else living in there.
MayaBees · Oct 25, 2026
I reuse store frames from mite collapses every year and have never regretted it. The part I'd take seriously is your last principle: I only do it when I actually examined the dead-out properly. If I open a dead-out and find anything I can't explain — foul smell, sunken perforated cappings, scales stuck in cells — the whole box goes out of my system rather than into a good colony.
AlpineCarnica · Oct 25, 2026
Agreed, with one addition. Give the frames to STRONG colonies, not weak ones. A strong colony cleans up and uses them; a weak one gets a box of food it can't cover and you've made a robbing target. And don't stack them outside for the bees to clean, which is how every yard-wide problem starts.
SkaneBees · Oct 26, 2026
Freezer for two days and then into the two strongest, one frame at a time beside the cluster. I'd talked myself into rendering the lot out of vague anxiety, which would have been eight kilos of honey wasted.