. 238 PESTS OF ORCHARD AND SMALL FRUITS 
dence of the work of the peach-tree borer. This may be observed at 
any time of year, but the gum is fresh in late summer or very early 
Fic. 307.— The Peach-borer. Larva in burrow. Slightly enlarged. Original. 
in the spring. If one will take a sharp knife and cut through the bark, 
one will find a burrow running in the sapwood, and at its end a yellowish 
or pinkish grub, with brown head. The length of a full-grown grub 
isabout oneinch. Peach trees are much weakened 
by the attack, and if several borers are present, 
the tree may be killed. Cherry and plum trees 
are infested to some extent by the same borer. 
¥, The adult is a moth, but its clear wings give it 
much the appearance of a wasp. In the female 
only the hind wings are clear. Its general color 
is deep blue. The abdomen of the female is 
marked by an orange band. 
Eggs are laid in May, June, or July, directly on 
the bark, usually near the ground. The young 
j grub works entirely in the sapwood, from the time 
Fic. 308.— Cocoon ‘ 
ofthePeach-borer, When first hatched until the early part of the 
Original. following summer, resting and remaining dormant 
during the winter months and resuming activity 
in the spring. The moths emerge from May until July. There is 
one generation each year. 
