CHESTNUT BARK DISEASE. 9 
some little time. Rains are very effective in washing spores to 
various parts of the tree below the infected portion. 
PROGRESS OF DISEASE. 
While we have not much definite data at hand to show just 
how fast the disease progresses after attacking a large tree, we 
have found by inoculating small seedlings and sprouts that 
these may be entirely girdled in one season, and from general 
observations on marked trees at Stamford and Middlebury it 
takes at least two years to kill the tree and probably three or 
four. Of course how long it takes the blight to kill a tree 
FIG, III. SPROUT WITH DEAD BARK AROUND INOCULATION POINT. 
depends on where the tree is attacked. If it is attacked on the 
small branches these will be killed but the rest of the tree will 
remain healthy and in a growing condition for a considerable 
time. On the other hand if the infection is on the main trunk 
this will be girdled and the entire tree killed in a much shorter 
time. Certain weather conditions also apparently affect the rate 
of development of the fungus. 
DISTRIBUTION IN CONNECTICUT. 
At the present time the chestnut blight is distributed entirely 
over Connecticut. The accompanying maps show its spread from 
1908 to 1912 and also show approximately the varying degrees 
of damage done in various parts of the state. The trouble 
is more serious in the southwestern part of the state and west of 
the Connecticut River. This is probably due to the fact that 
there is more chestnut in the western half. It was reported 
