22 



The fruiting spots of the fungus may be observed in the gray central 

 portion of the spotted areas on the canes (Fig. 1). The spores are minute 

 and curved; at maturity they escape from beneath the cuticle in a gummy 



Fig; 1 — Canes of Raspberry showing spots produced 

 by anthracnose. 



substance which dries on exposure to the air and sets the spores free. They 

 are readily blown by the wind, and may germinate at once and infect new 

 canes. 



From the fact that no winter form of spore has yet been found it is 

 believed that the mycelium winters over within the tissues of affected 

 plants. 



Treatment — This is a difficult disease to control, and fungicides alone 

 are not sufficient to keep it in check. Diseased canes as well as the 

 diseased leaves should be removed and burned ; care should be taken to set 



