116 



Diseases of Economic Plants 



Anthracnose can readily be distinguished from the leaf 

 spots mentioned above by the fact that the spots produced 

 in anthracnose are very much smaller, less angular, and 

 lack in every way the distinguishing characters of the other 

 leaf spots. 



No conclusive evidence as to the best treatment is at hand. 

 The best recommendation is probably that of the Geneva 



Fig. 58. — Anthracnose of white currants. After Clinton. 



Experiment Station: "Spray thoroughly with Bordeaux 

 mixture, commencing before the leaves appear. Make the 

 second treatment as the leaves are unfolding and thereafter 

 at intervals of ten to fourteen days until the fruit is two-thirds 

 grown. In wet seasons make one or two applications after 

 the fruit is gathered. When worms appear, add Paris green 

 or green arsenoid to the Bordeaux." 



European rust {Cronartium ribicola F, v. Wal.). — Orange- 



