INSECT ENEMIES OF EASTERN FORESTS 465 
The lilae borer (Podosesia syringae (Harr.)) attacks lilac, privet, 
and ash. ‘The moth is somewhat similar to P. frawini. The body has 
a brownish tinge and sometimes the abdomen is marked with yellow. 
It is oenerally dis- 
tributed through the 
Eastern States and 
from Texas and Col- 
orado to Canada. 
The white or yellow- 
ish larvae bore into 
the main stems, caus- 
ing them to wilt or 
become unhealthy in 
appearance, and 
sometimes to break 
off (fig. 105). There 
is one generation a 
year. The moths 
emerge late in April 
and May in New 
England. Grayson 
(198) reported that 
in Virginia the moths 
emerge in August 
and September, ‘and 
the winter is passed 
as partly grown lar- 
vae in the cambium. 
For control cut and 
burn the infested 
parts. 
F\AMILY 
OLETHREUTIDAE 
The Olethreutidae 
form a large family 
having a great num- 
ber of species, many 
of which are of prime 
economic importance. 
Four species, at least, 
are common § intro- 
duced pests. Nearly 
every type of larval 
activity 1S repre- 
sented. A great 
many of the species 
are borers in the 
roots, stems, bark. 
seeds, or fruit of 
trees, shrubs, or low-  Fygure 105.—Section of ash tree showing injury by 
the lilac borer (Podosesia syringae). 
