Bui. 534, U. S. Dept. of Agriculture. 



Plate II. 



Apple Leaves and Twigs Showing Blotch. 



1 and 2, 1 -eaves of the Arkansas Black variety, with spots caused by the blotch fungus, Centerton, 

 Ark., July 31, 1915; 3, 1-year-old blotch canker on Ben Davis apple twig, Bentonville, Ark., 

 1914; 4, 2-year-old blotch canker on Ben Davis apple twig, Bentonville, Ark., 1914; 5, leaf of 

 the Missouri variety, showing lesions on petiole and midrib produced by artificial inoculation 

 with spores of Phyllosticta solitaria from pure cultures; 6, an older blotch canker on a Ben Davis 

 twig, Bentonville, Ark., September 9, 1916. 



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