Sunday, February 19, 2012
Using a black light ( Amazon.com about $12.00 ) makes foulbrood scale take on a greenish color. It is always on the bottom of the cell. The frame has to be positioned so the eye is looking from the top bar side of the frame looking down at the bottom of the cells.
Healthy comb looks normal under the light. Don't get confused with pollen in a cell. Pollen is packed into the cell and fills up the cell. Again, foulbrood scale is ALWAYS on the bottom of a cell.
Any frames with foulbrood scale should be burned. They will ALWAYS reinfect a colony if they are not eliminated from the colony.