FUNGOUS DISEASES OF PLANTS 



the midrib, as if sunburned. Eventually the leaves fall prematurely 

 and the vitality of the tree is greatly affected. The perithecia appear 

 on the upper surface of the leaves, but are not usually present, at 

 least abundant, over the whole affected area. 



FIG. 167. PHYLLOSTICTA SOLITARIA: APPLE BLOTCH 



Phyllosticta hortorum Speg. 1 occurs both upon leaves and fruit 

 of the eggplant (Solanum Melongena), producing upon the latter 

 soft spots which become shrunken and decayed, rendering the fruit 

 worthless. 



Phyllosticta solitaria E. & E. A fungus producing a d'estruc- 

 tive fruit blotch 2 of the apple in the South has recently been 

 identified as the above species. The disease is more common 

 upon the light colored varieties of this fruit. 



1 Halsted, B. D. Some Fungous Diseases of the Egg Plant. The Leaf-Spot 

 Fungus. N. J. Agl. Exp. Sta. Kept. 12 : 279-281. 1890. 



2 Scott, W. M., and Rorer, J. B. Apple Blotch. Bureau Plant Ind., U. S. Dept. 

 Agl. Built. 144: 1-28. pis. 1-6. 1909. 



