46 PRESENT STATUS OF CHESTNUT BARK DISEASE. 
scopically. Reports have been received indicating that the disease 
is found at many other places, but not being substantiated by 
specimens these localities have not been shown on the accompanying - ° 
map. It is only fair to state, however, that such reports have been 
received from points as remote as Cape Cod, Wellesley, and Pitts- 
field, Mass.; Rochester and Shelter Island, N. Y., and Akron, Ohio. 
The bark disease is entirely different from a disease which during 
the past twenty years has caused the death of many chestnut trees 
on the Atlantic slope, particularly south of the Potomac River. The 
latter disease, which is now being studied by the Department of 
Agriculture, is asso- 
ciated with insects, is 
much slower in action 
than the bark disease, 
and produces, a stag- 
headed condition of the 
tree. It can be quite 
confidently stated that 
the bark disease does 
not yet occur south of 
Virginia and at only a 
few points in that 
State. 
Investigations are in 
progress to determine 
the origin of the bark 
disease in America and 
the details regarding 
itsspread. The theory 
Fic. 2.—Map of the eastern portion of the United States, ady. i i 
showing the distribution of the chestnut bark dis- anced aoe Previous 
ease. The heavily shaded part shows the counties publication of this Bu- 
wherein infection is already complete. The round reau,¢ th 
: at ‘- 
dots show other points where the disease is positively ? the Japan 
known to occur. ese chestnuts were the 
original source of 
infection, has been strengthened by many facts. It yet lacks much 
of demonstration, however, and is still advanced only tentatively. 
While the disease has spread principally from the Vicinity of 
New York there is much to indicate that it occurred at other points 
at an early date. Chester’s Cytospora on a Japanese chestnut 
noted at Newark, Del., in 1902, may have been the bark disense, 
Observations by the junior writer indicate that this disease may 
have been present in an orchard in Bedford County, Va., as early 
“Bureau of Plant Industry, U. 
Part VI. 1908. 
141—y 
8S. Department of Agriculture, Bulletin 121, 
