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Mason bees are susceptible to many parasites and diseases, increasing over time, especially when the same nest materials are used for multiple seasons. One of the most destructive diseases of cavity-nesting bees is chalkbrood, which is caused by the fungal pathogen Ascosphaera.Several species of Ascosphaera exist, including Ascosphaera torchioi (affects mason bees), A. larvis, and A. aggregata (affects alfalfa leafcutter bees). Chalkbrood disease also affects honey bees, but it is caused yet ano …

Dr. Jason Graham is the lead researcher developing conservation for the endangered Hawaiian yellow-faced bees in the Plant and Environmental Protection Sciences Department at the University of Hawaii at Mānoa. Seven species of Hawaii's yellow-faced bees were placed on the endangered species list in October 2016, these are the first species of bees to be protected and labeled as endangered. Dr. Graham has designed and is testing an artificial nest system that has helped him to study the ecol …