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MEANS OF CONTROL. 
The ‘‘key-note”’ in the control of this pest is “eternal vigi- 
lance.’ As has already been mentioned, it is comparatively easy 
to detect the presence of this insect, but unfortunately it is not 
usually detected until the worst of its damage has been done. If, 
however, young and newly planted trees were closely inspected 
during the summer it is possible that many of these larvae could 
be detected before they have penetrated far into the tree. If 
the trunk of the tree could be protected the smaller branches 
could be pruned off when infected without ruining the entire 
tree. The destruction of the larvae even after the damage has 
been done to the tree would still be beneficial in preventing the 
spread of the insect, and this is no small item, since a single adult 
is able to lay a large number of eggs. In several cases during this 
season the larvae have been detected just as they were penetrating 
the bark, and destroyed. In such cases a double purpose is 
served, the destruction of the larva and the protection of the tree 
‘attacked. 
There are two ways of destroying the larvae after they have 
entered the tree—(1) by injecting a poison such as bisulfid of 
carbon into the burrow and stoppping up the hole with putty and 
(2) by removing the larva with a wire provided with a hook or 
barb at the end. It is as easy to remove the larva as to kill it 
with poison, and this is probably the surest means of getting rid 
of it. The channels are nearly Fereaae and so large that there 
is no difficulty in reaching them in this w: 
The smaller infested branches on old trees sahauld be removed 
and destroyed, and small trees which are badly infested in the 
main trunk should be replaced with healthy ones of the same 
kind, or as is still better, with those which are free from the 
attacks of this insect, if such trees can be found. The ash seems 
to be especially susceptible to this as well as to the ash-borer 
and it is doubtful if it should be planted to any great extent 
unless plans are made to guard it closely against these enemies. 
Local control of this insect in parks ought to be easily effected, 
since it is claimed that the adult female cannot fly far, but is 
often blown from one tree to another. If this is the case local 
