ForumPests & Disease

Found chalkbrood mummies on the landing board — what now?

Five or six little white mummies on the landing board this morning, looks like classic chalkbrood. Hive is otherwise active, bringing in pollen, queen laying. Do I just monitor or is there something to actually do?
#chalkbrood#disease
▲ 17 votes 💬 3 replies ✅ Solved
3 replies
ImkerinLena · Jun 2, 2026 · ✅ Accepted answer
Chalkbrood is opportunistic — usually shows up in damp / cold / stressed colonies. Strong colonies clear it themselves. Things you can do: improve ventilation, requeen with hygienic stock at next opportunity, avoid moving sealed brood between hives.
CorkBeeRon · Jun 2, 2026
Sun exposure helps too. If your hive is in deep shade, consider moving it to morning sun. The bees will dry the hive out faster and the chalkbrood will fade.
VTBeeHannah · Jun 2, 2026
Mine had chalkbrood last spring, by midsummer it was gone with no treatment. Just stayed on top of inspections and made sure they had room.
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