120 MANUAL OF FRUIT DISEASES 
picking, the fruit should be graded carefully, and suspicious or 
affected fruits should be discarded. 
REFERENCES ON Pinx-Rot 
Eustace, H. J.. A destructive apple rot following scab. New York 
(Geneva) Agr. Exp. Sta. Bul. 227 : 367-389. 1902. 
Craig, John, and Van Hook, J. M. Pink rot an attendant of apple scab. 
Cornell Univ. Agr. Exp. Sta. Bul. 207: 161-171. 1902. 
Ivanov, K. 8S. Uber Trichothecium roseum Link, als ursache der 
bitterfaiule von friichten. Zeitschr. f. Pflanzenkrankheiten, 14: 
36-40. 1904. 
WatTER-CoORE 
Caused by abnormal water relations 
Some varieties of apples under certain conditions show a 
peculiar glassiness in and about the core. The Fall Pippin is 
said to be badly affected, and the disease has been observed on 
several other varieties, including the Early Harvest, Yellow 
Transparent, Pound Sweet, Tompkins King and Rambo. In 
general, summer varieties suffer most. 
Water-core has undoubtedly been present in the apple sections 
of the world for many years, but authoritative records are not 
old. It was noted in Maryland in 1908, but is thought to have 
occurred there several years before. Reports have recently 
come from other regions of the United States which make it 
certain that the trouble occurs generally over the country, 
particularly in arid and semi-arid districts. Apple-growers of 
Europe, Asia, Africa and Australia are familiar with this pecul- 
iar disease in the fruit, and the complaints which come from 
these continents indicate its troublesome nature. 
Symptoms. 
Affected fruits are found more particularly on the tops of 
thrifty trees, and on healthy branches which have less foliage as a 
result of having been pruned back. Shaded fruits may be 
