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The role of pollen in chalkbrood disease in Apis mellifera: transmission and predisposing conditions

     Centro Andaluz de Apicultura Ecológica, Universidad de Córdoba, Campus Universitario de Rabanales, 14071 Córdoba, Spain

R. Espejo

     Departamento de Estadística e I. O. Universidad de Córdoba, Spain

Chalkbrood in honeybees (Apis mellifera L. Himenoptera: Apidae) is a fungal disease caused by Ascosphaera apis (Maassen ex Claussen) Olive and Spiltoir. This disease requires the presence of fungal spores and a predisposing condition in the susceptible brood for the disease to develop. In this study we examined the role of pollen in the development of chalkbrood disease under two experimental conditions: (i) pollen combs were transferred from infected to uninfected beehives and (ii) colonies were deprived of adequate pollen supplies to feed the brood. The results of both treatments confirmed that pollen is an element that should be taken into account when controlling this honeybee disease.

Key words: Ascosphaera apis, fungal disease, epidemiology, honeybee