Bul. 534, U. S. Dept. of Agriculture. PLATE Il. 
APPLE LEAVES AND TWI@S SHOWING BLOTCH. 
1 and 2, Leaves 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. 
