The key to keeping hives healthy is to identify diseases & pests quickly. The following are links to pictures you should use to help recognize varrious condidtions.
GARDENS ARE - Display Cases, Insect Pins, ...100 VIOLETWOOD CIRMARLBOROUGH MA 01752–6493
Home Training Tools665 Carbon St.Billings, MT 59102
Ward's Natural SciencePO Box 92912Rochester, NY 14692-9012
Tropical Butterflies and Insects of America6823 Rosemary Dr.Tampa FL 33625-3980
United States of America