The incidence of pathogens in honey bee (Apis mellifera L) colonies in Finland and Great BritainA.L. Varisa, B.V. Ballb and M. Allenb
a University of Helsinki, Department of Agricultural and Forest Zoology, Finland
b AFRC Institute of Arable Crops Research, Department of Entomology and Nematology, Rothamsted Experimental Station, Harpenden, Herts, AL5 2JQ, UK
Abstract - Dead adult bees collected from 26 apiaries distributed throughout Southern Finland were examined for protozoan, microsporidian and viral pathogens. Malpighamoeba mellificae was not found, but Nosema apis was detected at low levels in 11 of the 39 samples examined. Of the 51 samples examined for viruses, bee virus Y was detected in 2, cloudy wing virus in 14 and filamentous virus in 13. These findings are compared with pathogen incidence in honey bee colonies in Britain and discussed with reference to winter losses and Varroa jacobsoni infestation.
Key words: Apis mellifera / Varroa jacobsoni / Nosema apis / honey bee virus / Finland / Great Britain