FIELD DISEASES 137 



sweet peas it assumes the nature of an epi- 

 demic and may cause death of all the 

 foliage. 



ANTHRACNOSE 



Glomerella rufomaculans (Berk.) V. Sch. 

 and Sp. 



Of all field diseases Anthracnose is per- 

 haps the most dreaded in the United 

 States because of the great losses it occa- 

 sions. Anthracnose on the sweet pea may 

 exist wherever apples are suffering from 

 bitter rot, for, as the writer has definitely 

 proven, bitter rot of apples and anthrac- 

 nose of sweet peas are caused by the same 

 fungus, Glomerella rufomaculans. 



Symptoms. The symptoms of anthrac- 

 nose are varied. Sometimes it is mani- 

 fested by a wilting or dying of the tips 

 (fig. 23) which become whitish and brittle 



