to 
FARMERS’ BULLETIN 650. 
This insect, on account of its great similarity to certain other spe- 
cies of scale insects, may not be positively determined except by 
specialists. The occurrence of diseased and dying branches showing 
severe scale infestation furnishes strong presumptive evidence of the 
presence of this pest, but specimens of infested twigs should be 
promptly submitted to a qualified person for examination. 
The appearance of a three-year-old peach tree, presumably infested 
from the nursery, is shown in figure 1. The principal limbs have 
already been killed, although new shoots have developed. A tree 
in this condition generally may be saved by thoroughly pruning out 
Fia.1.—Appearance of 3-year-old peach tree badly injured by the San Jose scale, thelarger branches having 
been killed. (Author’s illustration.) 
the dead and badly injured wood and subsequently effecting the con- 
trol of the scale by spraying. The condition of this tree a year later 
is shown in figure 2, indicating the recovery following pruning and 
spraying. Figure 3 illustrates a badly infested six to seven year 
old peach orchard, the original infestation of which came from an 
adjacent orchard. Even in the case of peach trees so badly infested 
as these it is very probable that dehorning and thorough spraying 
would bring the trees into condition again. It is a matter of judgment, 
however, whether trees so seriously injured should not be removed. 
The character of injury to an apple orchard, in which the trees 
were infested from outside sources four or five years earlier, is shown 
