Angoumois Grain Moth. 7 
life cycle representing one generation from egg to adult requires 
in warm summer weather from 5 to 7 weeks, though the immature 
stages have been passed in as few as 4 weeks. During the cold of 
winter months the larva lies dormant for 4 or 5 months and the life 
cycle may be fully 6 months long. In the southern wheat belt of 
New Jersey there may be 
five generations of moths 
in a year under prevailing 
cultural conditions where 
wheat is left in the field 
until late in the season. 
The farther south one 
goes the greater is the 
number of generations, 
and in heated warehouses 
or rooms there may be as 
many as 10 to 12 genera- 
tions. 
ALL CEREAL GRAINS 
AFFECTED. 
. The Angoumois grain 
moth has been bred from 
wheat, barley, oats, buck- 
wheat, corn, sorghum, 
milo, rice, beans, chick- 
peas, and cowpeas. It is 
a general feeder upon 
seeds of the cereal type. 
It causes greatest loss to 
wheat and corn in this 
country, though instances 
of serious attack are re- 
corded frequently upon 
other grains. Beans, 
chickpeas, and cowpeas 
usually are not attacked, 
though if held in storage 
for considerable periods 
the Angoumois grain ic. 4.—Kernels of corn cut in two to show the 
moth has been known to damage caused by the larva or worm of the 
ik 1 ss Angoumois grain moth. The worm usually enters 
cause Much damage, par- the seed at the base, destroys the germ, and 
ticularly in seeds alreadv then tunnels toward the tip of the kernel. Af- 
M4 fected kernels nearly always are ruined for 
slightly injured by han- planting purposes. 
