APPLE DISEASES 105 
For the past twenty years the prevalence of the trouble has 
been noticed commonly along the Atlantic seaboard south of the 
New England states. But the disease occurs elsewhere; it is 
found in Canada as far north as Quebec, and is well known 
throughout the eastern, middle and western states. It was 
unusually common in 1902 in Rhode Island and Connecticut. 
Again in 1906 an outbreak occurred in these and surrounding 
states, particularly in New York, Pennsylvania, Maryland, 
West Virginia and eastern Nebraska. Special notice of it was 
made in Ohio about 1890 and in the subsequent vears 1896 and 
1909. The disease was very prevalent in New York in 1915. 
It was first recorded 
from the state of 
Washington in 1907. 
In 1910, authorities 
claim, sooty-blotch 
was first recorded in 
England. 
Symptoms. 
The names sooty- 
blotch and_ fly-speck 
adequately describe 
the appearance and 
effects of this disease. 
The blotches (Fig. 28) 
are abundant in the 
months of July and 
August. They are irregular in outline, tending to be circular. 
At first the color is pale, but later, as the name suggests, the 
color is a sooty-brown or black. On account of the appearance 
of affected fruit, dealers often call it the cloud or clouded fruit 
(Fig. 28). Single spots measure from one-fourth to one-half of 
an inch in diameter; often several lesions coalesce, covering 
the apple as if with soot. Spots exhibit a radiating structure 
Fig. 28. — Sooty-blotch. 
