APPLE DISEASES 81 
REFERENCES ON BLISTER-CANKER 
Hasselbring, H. Canker of apple trees. Illinois Agr. Exp. Sta. Bul. 
70 : 225-239. 1902. p 
Gloyer, W. O. Apple blister canker and methods of treatment. 
Ohio Agr. Exp. Sta. Cire. 125: 149-161. 1912. 
Pammel, L. H., and King, C. M. Four new fungous diseases in Iowa. 
The blister canker of the apple or Illinois canker (Nummularia 
discreta Tul.). Iowa Agr. Exp. Sta. Bul. 131: 212-215. 1912. 
NoRTHWESTERN ANTHRACNOSE 
Caused by Neofabrea Malicorticis (Cordley) Jackson 
This is a disease peculiar to the Pacific Northwest. In 
consequence of this fact it is often called Pacific Coast canker 
and Northwestern apple-tree anthracnose. It is known to 
occur most abundantly in the states of Washington and Ore- 
gon. It is not recorded in California, although it probably is 
present in the northern part of that state. It was once re- 
ported as far east as Nebraska, but the disease is unknown in 
any section of the United States other than that already indi- 
cated. Outside of the United States it is found only in British 
Columbia. It is believed that the apple-tree anthracnose 
originated somewhere within its present geographical range 
on some native host. It did not begin to attract serious atten- 
tion on the apple, however, until 1891. Since that time its 
ravages have increased until in the Northwest the anthracnose 
is second in importance only to apple-scab. It is most serious 
in those regions west of the Cascade Mountains, where con- 
siderable rainfall occurs. It is rarely serious in eastern Oregon. 
On account of the nature of the injury the amount of the 
losses is difficult to estimate. The twigs, sometimes the larger 
branches, and even the trunks of young trees are likely to be 
girdled. A single tree may show from one to more than one 
hundred cankers varying in length from one-fourth to six 
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