What does the capping of honeycomb appear like when AFB is present?

When American Foulbrood (AFB) is present in a beehive, the capping of the honeycomb can develop a greasy appearance. This characteristic is a result of the disease causing the honey stored in the cells to ferment and produce a more viscous substance, which can lead to a sheen on the surface of the capped honey. The greasy look is an indication that the honey has been affected by the spores of the bacteria that cause AFB, leading to an unhealthy state within the hive.

Recognizing this unique appearance is critical for beekeepers, as it can aid in early diagnosis of AFB, allowing for timely management and treatment to prevent the spread of the disease in the colony. Proper identification and intervention are essential for maintaining the health of the hive and ensuring that affected colonies do not transmit the disease to others. Understanding these visual cues can significantly enhance a beekeeper's ability to maintain healthy populations.