CHESTNUT 
BLIGHT AND RESISTANT CHESTNUTS 9 
I'icgure 8.—The central part of the canker at the left is sunken where the fungus has 
killed the bark through to the sapwood. 
The canker at the right is slightly 
swollen and has the cracks characteristic of swollen cankers. 
and seedling trees may escape the 
blight for a number of years, espe- 
cially in localities where chestnut 
trees and blight infections are rare. 
Those that do so are not necessarily 
resistant and may eventually be- 
come infected with the blight and 
ie as a result. 
For a number of years after the 
chestnut trees in different localities 
were killed by the blight, the 
sprouts rarely reached a diameter 
of more than 2 inches before they in 
turn were killed. Now, in some 
of these localities some sprouts 
reach a diameter of 5 inches or 
more—a few of them even produc- 
ing viable nuts—before they are 
killed by the blight. There are 
fewer blight fungus spores present 
to cause infection, because of the 
disappearance of many of the old 
blighted trees. 
The United States Department of 
Agriculture and the Connecticut 
Agricultural Experiment Station 
are glad to receive reports of any 
large American chestnut trees that 
appear to be resistant after having 
