Fig. 5. Ascosphaera apis mating test and production of inoculums. A. Mating test with four isolates of unknown mating types. Unknown 1 mates with ARSEF 7405 (+) and therefore harbours the opposite mating type (-). B. Production of inoculums between two isolates of opposite mating types. Fruiting bodies with spores inside are formed where the hyphae meet (black zone). Photo: A B Jensen.