SMALL FRUITS 175 



Septosporiose (Septosporium heterosporium'Ell. & Gall.). — 

 As seen from above in its first appearance upon the leaves, 

 this disease resembles the downy mildew. From below the 

 spots are round, l)lack, and irregular. As they enlarge they 

 may involve the whole leaf. 



This disease is common upon wild vines, often causing loss 

 of the leaves in damp situations, but has been as yet of no 

 serious injury to cultivated vines in America. 



Scab (Cladosporium viticolum Ces.). — The leaf spots 

 produced by this disease show considerable resemblance 

 to those of the black rot, l3ut bear no pycnidia. When 

 numerous, they coalesce, forming patches of dead tissue. 

 They are often bordered by a ring, red in the living 

 tissue, black on the dead dried leaf. Spore-bearing hyphae 

 abound in the centers of the spots upon the lower side of 

 the leaf. 



Pestalozziose (Pestalozzia uvicola Speg.). — This is char- 

 acterized by small black pustules under and protruding 

 through the epidermis of the fruit and associated witli 

 rotting. 



It has seldom been observed in America and is as yet of 

 small importance. 



RASPBERRY 



Anthracnose (Gloeoaporium Venetum Speg.). — The first 

 publication in America regarding this disease seems to have 

 been made in 1882 by Burrill.i 



Since then nmnerous papers from many sections attest 

 its importance. It is widely distributed and often serious. 

 In 1907 it was estimated to have injured one third of the 



' Burrill, T. J., Agricultural Review, November, 1882. 



