Archive image from page 24 of Diagnosing bee diseases in the. Diagnosing bee diseases in the apiary . diagnosingbeedi392burn Year: 1936 DIAGNOSING BEE DISEASES IN THE APIARY 23 FUNGOUS DISEASES OF BROOD CAUSES 111 addition to the diseases previously described, diseases of the brood of bees are caused by several different fungi. The most com- mon of these are species of Aspergillus, In this country A. -flavus attacks brood more frequently than other fungi. In Europe a fun- gus known as Pericystis apis causes a disease of brood known as 'chalk brood.' This fungus does not occur in North America
Archive image from page 24 of Diagnosing bee diseases in the. Diagnosing bee diseases in the apiary . diagnosingbeedi392burn Year: 1936 DIAGNOSING BEE DISEASES IN THE APIARY 23 FUNGOUS DISEASES OF BROOD CAUSES 111 addition to the diseases previously described, diseases of the brood of bees are caused by several different fungi. The most com- mon of these are species of Aspergillus, In this country A. -flavus attacks brood more frequently than other fungi. In Europe a fun- gus known as Pericystis apis causes a disease of brood known as 'chalk brood.' This fungus does not occur in North America. IMPORTANCE Normally only slight losses of brood are caused by fungous dis- eases. The small amount of brood that is killed is removed prompt- K I .1 â -,: ft f-i I â 1 - >~« .. , >â¢â ....... lilC-rv:' ',v:.... ' 'â . .⢠,-w . .. Figure 15.âBrood comb artificially inoculated with Aspergillus flavus, a fungus that kills the brood of bees. Dead larvae of different ages can be seen in the cells. ly by the worker bees and is rarely noticed by the beekeeper. Brood is most likely to become infected when moisture collects in the hive late in the winter and early in the spring, permitting fungi to grow over the combs. AGE OF BROOD AND RACES OF BEES AFFECTED Brood of all ages, and alsoi adult bees, are susceptible to fungous diseases. After the feeding period is passed, however, and the cells have been capped, brood is less likely to become infected. All the races of bees common in this country are susceptible.
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