194 REPoRT OF THE BOTANIST OF THB 
tical in size and appearance with those found on the fruit, twigs 
and knots. Sometimes the spores were quite abundant, but 
again entirely absent. | 
In short, it may be said that brown spot of peaches is caused 
by Helminthosporium carpophilum which is also sometimes para- 
sitic on the twigs; that it often occurs on the knots and some- 
times on the leaves, but whether it is the cause of the knots or 
_ is parasitic on the leaves we do not know. It also attacks apri- 
cot fruits. 
Very little-has been written about the disease in America. 
Taft*’ mentions its occurrence in Michigan, and according to 
Selby” it is common in Ohio. In New York it is, as yet, com- | 
paratively unimportant. Selby’s experiments indicate that it 
may be readily controlled by spraying with weak Bordeaux mix- 
ture after the fruit has set. However, there is considerable 
risk in spraying peaches in foliage and it should be avoided if 
possible. ‘ 
A Disnasp OF PracuEs IN THE Nursery Cetiar.—In the win- 
ter of 1899-1900 a nurseryman had an interesting experience 
with peach trees in his nursery cellar. The cellar contained 
about 10,000 peach trees of several different varieties which were 
trenched in according to the usual custom. At the time the 
trees were put in the cellar in the fall some of them were wet 
and others dry. In trenching them in, sand was thrown over 
them and allowed to fall down among the branches. On the wet 
trees considerable sand stuck to the branches. | 
About January 1 it was noticed that there was something 
wrong with the trees having sand on their branches. It was 
found that in many places on the branches there were sections 
from one to four inches in length on which the bark was dead 
and black or brown. About 15 per ct. of all the trees in the 
cellar were more or less affected in this manner, but the trouble 
was confined entirely to the trees with sand on the branches. 
*Taft, L. R., Mich. Agr. Exp. Sta. Bul. 108 : 57-58. 
“Selby, A. D., Ohio Agr. Exp. Sta. Bul. 92 : 224-225. Selby calls it 
“brown or pustular spot.” 
