Pests & Disease

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Still 6 per 300 after thymol — too late in September to retreat with Apivar before the winter bees are gone?

Third year in Kent, four colonies, and I'm annoyed with myself. Two Apiguard trays, 14 days apart, started on the 8th of August and finished on the 5th of September, ekes…

KentishBee · Kent, UK · Pests & Disease · Sep 18, 2026 · ▲ 12 · 💬 4

Wax moth webbing in the supers I stored two weeks ago — freeze them, Certan/B401, and are moth crystals ever OK?

First year in Minnesota, two hives. I extracted four mediums in late August, let the bees clean them for a day, then stacked them in the garage with a lid on top and forg…

mn_newbee · Minnesota, US · Pests & Disease · Sep 17, 2026 · ▲ 9 · 💬 3

Found the yellowjacket nest 20 meters from my hives — take it out now, and how, or is it not worth it this late?

Central Texas, twelve colonies. The yellowjackets have been hammering my two weakest hives for three weeks — robbing screens are on and holding — and yesterday I finally …

TexasBeeSam · Texas, US · Pests & Disease · Sep 16, 2026 · ▲ 9 · 💬 4

Mid-September Formic Pro with a capped sourwood super still on — can it stay, and do the entrance reducers come out?

Third year, NC piedmont, five colonies. I wanted to treat in August but our highs sat in the 90s all month, so I waited. This week the highs finally dropped to 82-84°F an…

SourwoodGrace · North Carolina, US · Pests & Disease · Sep 14, 2026 · ▲ 11 · 💬 4 · ✅ Solved

Does oxalic acid do anything in September with brood present? Planning for the broodless window instead

Vermont, second year, three hives. Formic Pro came off late August and my verification wash this week says 4, 3 and 5 per 300, so lower but not the under-3 I wanted. A cl…

VTBeeHannah · Vermont, US · Pests & Disease · Sep 12, 2026 · ▲ 12 · 💬 4 · ✅ Solved

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 · ▲ 14 · 💬 4

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 · ▲ 8 · 💬 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

Final mite wash of the season — post your before/after treatment numbers here

Annual tradition, third year running: the end-of-season wash thread. Post your pre-treatment count, what you treated with, and your post-treatment verification wash so we…

MayaBees · Oregon, US · Pests & Disease · Sep 1, 2026 · ▲ 12 · 💬 5

Rotating treatment classes against resistance — my amitraz/thymol/formic/oxalic logic, poke holes in it

Fourteen years in Tuscany, and after watching fluvalinate and coumaphos become expensive placebos across much of Europe, I treat rotation as non-negotiable. My current lo…

MieleMarco · Tuscany, IT · Pests & Disease · Aug 30, 2026 · ▲ 11 · 💬 4

Yellowjackets stripped a dead-out before I got to it — is the drawn comb still safe to reuse?

Quebec, five hives, well, four now. Found a dead-out this week — colony had been dwindling since July and finally gave out, and by the time I opened it yellowjackets had …

QuebecBees · Quebec, CA · Pests & Disease · Aug 28, 2026 · ▲ 9 · 💬 4 · ✅ Solved

Post-treatment verification wash: 9 per 300 before, 2 after — does that count as "worked"?

Finished a full Apiguard course on my worst hive (of five) here in the Willamette Valley and did my verification wash yesterday, three weeks after the second tray went on…

MayaBees · Oregon, US · Pests & Disease · Aug 24, 2026 · ▲ 11 · 💬 4 · ✅ Solved

Second Apiguard tray goes in tomorrow — queen's gone off lay, is that expected mid-treatment?

Six seasons in Flanders and first time using Apiguard (formic every other year until now, fancied a change while temps suit thymol). First tray went on two weeks ago, sec…

BuckfastLinda · Flanders, BE · Pests & Disease · Aug 22, 2026 · ▲ 7 · 💬 3

Wasp pressure peaking here — watching a strong colony vs a weak one handle it very differently

Wasps have gone from background noise to constant siege at my Perthshire apiary this week. Fascinating and grim to watch the difference between colonies. My two strong do…

PerthshireBees · Perthshire, UK · Pests & Disease · Aug 17, 2026 · ▲ 9 · 💬 3

Apiguard finished, recheck wash barely moved — 8 down to 6 per 300. What went wrong?

Pulled the second Apiguard tray last weekend after the full four weeks, waited a few days, then did my recheck wash yesterday. Pre-treatment I was at 8 per 300, now I'm a…

KentishBee · Kent, UK · Pests & Disease · Aug 17, 2026 · ▲ 10 · 💬 4 · ✅ Solved

Neighbour I mentor "doesn't believe in mite counts" — how do you actually win this argument?

Skåne, 8 years. I've been informally mentoring a neighbour two villages over — second season, two hives, lovely guy, completely allergic to monitoring. His position: "the…

SkaneBees · Skåne, SE · Pests & Disease · Aug 15, 2026 · ▲ 9 · 💬 4

Small hive beetle oil tray results, week by week — sharing my counts since installing

Georgia, 22 years, and this is my first season running oil trays under screened bottoms on all eight hives instead of just the worst two. Since folks ask about SHB every …

GeorgiaWes · Georgia, US · Pests & Disease · Aug 13, 2026 · ▲ 10 · 💬 3
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