12 Farmers’ Bulletin 1156. 
Fic. 10.—Three kernels of corn, the lowest one free from 
attack and sprouting normally. The larva of the Angou- 
mois grain moth has completely destroyed the germ of 
the upper kernel and it has failed to sprout. The germ 
of the middle kernel has been affected but slightly by the 
developing moth yet notice how small its shoot is as com- 
pared with that of the normal seed; it will die or pro- 
duce a sickly plant. Do not plant seed infested with the 
Angoumois grain moth. 
development is 
poorest, the infes- 
tation of maturing 
ears may be very 
general and result 
in heavy losses in 
storage. 
Figures 1 to 5 
and 10 illustrate the 
manner in which 
corn is injured. 
The moth lays her 
eges usually _ be- 
tween the kernels 
on the cob. On 
shelled corn the 
eggs may be laid 
anywhere. The 
newly hatched larva 
usually crawls to 
the germ end of 
the seed, bores in 
through the seed 
coat, which is there 
more tender, and 
thus finds itself in 
the softest part of 
the kernel. From 
the illustrations it 
will be seen that 
the larva usually 
eats out and de- 
stroys the embryo 
or germ of the seed, 
and then bores its 
way outward into 
the harder part of 
of the seed (figs. 1 
and 4). More often 
the emergence hole 
is found on _ the 
outer portion of the 
kernel, though this is not always so. Ordinarily, development occurs 
entirely within a single kernel, yet the larva may begin its feed- 
ing in one kernel and finish it in the adjoining one. In some varie- 
“a 
