476 



DISEASES OF BEES. 



cells in the hive are filled with rotten brood, the odor becomes 

 sufficientlj^ pronounced, but the nose is not to be relied on to 

 decide whether a colony has foul brood or not. Long before it 

 can be detected by the sense of smell, the colony is in a condi- 

 tion to communicate the disease to others. 



The eye alone can be depended on, and it must be a sharp and 



Fig. 212. 



APPEARANCE OF FOUL-BROOD. 



(Courtesy of N. E. France.) 



trained eye, too, if any headway is to be made in curing the 

 disease." (J. A. Green, in "Gleanings," January, 1887.) 



790. "Foul-brood can be detected in the Spring, either 

 through an unusual spreading of the brood, resulting from an 

 unnoticed previous infection, of an indefinite number of cells, 

 which contain sick or dead larvae, or, if the disease is just be- 

 ginning, by the presence among the brood, of sick or rotten 

 larvae. The larvae die and rot either before or after sealing. It 

 is only when the disease has lasted for some time, that the 



