New York AGricuLTuRAL EXPERIMENT STATION. 333 
together with notes* and a paper’ by the writer, and a poster 
bulletin,® is the extent of the bibliography on the subject. 
INVESTIGATIONS IN 1898. 
In the spring of 1898 the Chapin Brothers, of East Bloomfield, 
N. Y., requested the Experiment Station authorities to investigate 
the cause of the dying of trees in their orchard. Prof. Beach 
visited the orchard and saw at once that a canker was the cause of 
the trouble, the serious nature of which was plainly evident in the 
numerous dead and dying trees. The writer was detailed to work 
on the subject, and the history of the investigations, extending 
through two seasons, is herewith presented. 
The orchard in question originally consisted of one hundred 
and twenty-five acres. The trees on thirty of the eighty acres in 
one part were ruined by the canker and have been taken out, and 
the trees on one-half of the remaining fifty acres are now of little 
value. In the other part of the orchard originally consisting of 
forty-five acres, only about ten acres are left that are of much 
value. The owners have noticed the disease for the past six or 
eight years, but it has increased’ very rapidly in the last three or 
four years. They have also found that it shows a decided prefer- 
ence for certain varieties, the Twenty Ounce being the most sus- 
ceptible; then the Baldwin, Wagener, Greening and King follow 
in the order named. The Tallman Sweet appears to be practi- 
cally free from the disease. Trees growing in low land or in any 
situation where the ground was at all wet, were found to suffer 
4 Paddock. Science, 8: 596. An Apple Canker. Brief account of investiga- 
tions, and concludes that the disease is probably caused by the fungus 
Spheropsis malorum, Pk. 
P. 836. Additional Notes on an Apple Canker. Notes the occurrence 
of a Spheropsis on pear and quince trees, and as causing a twig blight of 

apple trees. 
5 Paddock. Proceedings of the Western N. Y. Hort. Soc., 1899, pp. 58-64. 
An Apple Canker. Popular account of investigations with the disease. 
6 Vermont Special Bulletin, April, 1899, gives illustrations of cankered 
apple-tree limbs. 
