Two complementary sheets: a brood-temperature guide and a general recognition and colony-support guide. Chilling increases susceptibility, but temperature ranges are reference points rather than exact disease cutoffs.
Chalkbrood — Brood Temperature Guide
Open or download the full-size sheet
Chalkbrood — Recognition and Colony Support
Open or download the full-size sheet
VarroaDestructor.com · BeekeepersLibrary.com · October 16, 2026