82 DISEASES OF TROPICAL PLANTS CH. 



are more or less kinky. These are the fruiting bodies. 

 They are mucilaginous or jelly-like, and contain great 

 quantities of spores. In localities of great humidity, 

 the thread-like structures are not formed, but the spores 





FIG. 38. Sugar-cane affected with "rind disease." 



form black, shiny masses on the surfaces of the cane at 

 the points of discharge. 



These spores are carried in various ways, but 

 primarily by the insects and by the wind. When 

 placed under suitable conditions, they germinate readily, 

 infect the new plants, and soon give rise to the disease 



