208 REPORT OF THE BOTANICAL DEPARTMENT OF THE 
failed to recover, and the death of some of these is attributed to 
mouse injury. 
These trees were carefully examined again in June, 1905. Prac- 
tically all of them came through the winter in good condition 
netwithstanding the large amount of new wood they had. Many 
of the trees had a small amount of fruit. 
The greatest objection to cutting back peach trees in this way 
is that it induces too large a growth of new wood and the tree 
becomes bushy. A good deal of judicious pruning is necessary to 
make sucb trees satisfactory. 
These results indicate that the winter-injured trees of over 
seven or eight years are killed by “ dehorning,”’ while the younger 
trees may be treated in that way and expected to make a good 
recovery. 
The results from a moderate pruning were encouraging in the 
case of both young and old peach trees. Trees adjacent to 
those “ dehorned ” were moderately pruned and marked for com- 
parison, and others to which nothing was done were also marked. 
In all cases these trees were under parallel conditions and of the 
Same age and variety. 
When examined the middle of June it was plain to see that 
they were much superior to the trees that had nothing done to 
them. The foliage was much more abundant in all parts of the 
tree; it was larger size, and more nearly normal in color. 
At the examination the latter part of September the difference 
was more striking than in June, for during the interval some of 
the unpruned trees had deteriorated, and parts of them had died. 
Plate XX shows the difference fairly well on September 27, 
1904. These were adjacent trees, of the Fitzgerald variety and 
about six years old. The tree shown in Fig. 2 was moderately 
pruned in April and that in Fig. 1 was unpruned. 
The difference between the pruned and unpruned trees was 
very apparent in June, 1905. The trees that had been pruned 
could easily be distinguished from the others by the foliage, 
which was larger and better colored, by more compact tops and 
by larger crops of fruit. 
The result was invariably the same with a large number of 
trees treated in this way, and the conclusion cannot be other 
