F-492960 
FIGURE 140.—Burl - like 
growths on trunk above 
gridled whorl, a sign of 
attack by Zimmerman pine 
moth. 
F-492959 
FIGURE 139.—Damage to ycung pine 
by Dioryctria zimmermani. 
older larvae in damaged second-year cones. In the Southeast, a 
high proportion of the overwintering population attacking elon- 
gating terminals of longleaf pine in the spring. The tips of these 
terminals soon turn brown and die. Most of the larvae move to 
and attack second-year cones by late June, entering them usually 
near the base. Entrance holes become filled with frass and pitch, 
and the pitch tends to spread over the outer surface of the cone. 
By late July, the cones are almost completely browned. If feed- 
ing continues in them to the end of the season, they dry out 
and remain either partially or entirely closed. Pupation occurs 
either in infested terminals or in hollowed-out cones, and there 
are several generations per year. This is one of the most abundant 
species of the genus in the Southeastern States where it occa- 
sionally causes heavy seed losses. 
F-519535 
FIGURE 141.Adult of 
Dioryctria amatella. 
3507 
