ForumPests & Disease

Mite wash came back at 9 per 300 — treat now or wait for the flow to end?

Did an alcohol wash this morning on my strongest hive and counted 9 mites. Main nectar flow has maybe 2 weeks left. Do I pull supers and treat with formic now, or risk the wait? Temps are 22–28°C all next week. Bees look strong, brood pattern is solid. I have Formic Pro and Apivar on hand.
#varroa#formic-acid#mite-wash
▲ 47 votes 💬 4 replies ✅ Solved
4 replies
CorkBeeRon · Jun 4, 2026 · ✅ Accepted answer
At 9/300 you're over threshold — don't gamble. Formic Pro works with supers on if temps stay under 29°C. Two weeks of brood damage isn't worth the honey.
KiwiBeek · Jun 4, 2026
Seconding this. I waited two weeks last year in a similar spot and lost the colony by September. Don't.
SkaneBees · Jun 4, 2026
9/300 = 3% — that's economic threshold + 50%. If you're already weighing options the answer is treat. Strong colonies bounce back from a slightly shorter flow window much better than they bounce back from severe varroa damage in autumn.
ImkerinLena · Jun 4, 2026
Watch the temps closely though — formic over 30°C will cook the queen. If you're touching 29 the day of application, switch to one of the cooler protocols. With Apivar you'd need supers off anyway.
More in Pests & Disease

Sugar roll then alcohol wash on the SAME 300 bees, eight hives — the autumn undercount is worse than I thought

I've always used the alcohol wash, but two club members swear by sugar rolls and I wanted real numbers, not forum opinions. So last weekend, all eight Oregon colonies: ha…

MayaBees · Oregon, US · Pests & Disease · Sep 11, 2026 · ▲ 1 · 💬 0

Yellowjackets walking straight into my hive at dusk — how narrow should the entrance be right now?

Third year in the North Carolina piedmont, four hives, and the yellowjackets have hit their stride. During the day the guards handle it fine — I watch them tackle a wasp …

SourwoodGrace · North Carolina, US · Pests & Disease · Sep 9, 2026 · ▲ 7 · 💬 4

Apivar strips going in now the honey's off — where in the brood nest, how many strips, and when do I recheck?

Supers came off my five colonies in Devon last week, all extracted, so Apivar is going in this weekend for the first time — I've used thymol the last three autumns and wa…

DevonBees_Em · Devon, UK · Pests & Disease · Sep 8, 2026 · ▲ 11 · 💬 4 · ✅ Solved

Cleaning up my first dead-out (queen failure, not disease) — what's actually safe to reuse?

Found my weakest colony dead this week — the one I'd been watching since the queen went patchy in July. Post-mortem: maybe two hundred dead bees, a little scattered cappe…

VTBeeHannah · Vermont, US · Pests & Disease · Sep 5, 2026 · ▲ 7 · 💬 3 · ✅ Solved

Vespa velutina season is here — how are you monitoring and reporting this autumn?

September in Provence means the yellow-legged hornets have found my apiary again. The secondary nests are at full strength now and the hawking has started — hornets hover…

LavenderSophie · Provence, FR · Pests & Disease · Sep 2, 2026 · ▲ 11 · 💬 4

The top 5 reasons colonies die over winter — and what to do about each one this month

Every spring this forum fills with dead-out posts, and most were decided in September. So here's my list from 22 years and a lot of scraped bottom boards, in order: 1. Va…

GeorgiaWes · Georgia, US · Pests & Disease · Sep 2, 2026 · ▲ 12 · 💬 4

Join 12,000+ beekeepers logging hives, asking questions, and mapping forage.

Get the Beekeeping Community app