Angoumois Grain Moth. 9 
Fic. 6.—A spike of sorghum with each seed showing the emergence hole of the 
Angoumois .grain moth. The moth completely ruins so small a seed as this. 
to 60 per cent. Millers have not infrequently 
refused to purchase badly damaged grains be- 
cause they contained so many dead insects and 
insect excrement. Flour made of badly in- 
fested seeds is not palatable. The actual 
weighing of 1,000 kernels of sound wheat and 
a like number of infested kernels showed a 
loss by weight of 56.2 per cent as a result of 
the development of a single moth in each of 
the infested kernels. (Tig. 9.) 
Corn does not lose so great a percentage of 
its weight. The weights of an equal number 
of infested and perfect kernels representing 
seven varieties of soft dent and flint corn 
showed that where but one moth had de- 
veloped in each infested kernel the infesta- 
tion had caused a loss in weight amounting to 
13.1, 13.2, 15.5, 17.3, 19.7, 23.5, and 24 per 
cent, respectively. The loss in weight varies 
with the ratio between the size of the kernel 
and the amount eaten by the individual in- 
sect in reaching its maturity. 
, Fic, 7.—A head of beard- 
MATURING GRAIN AND STORED Jess barley showing the 
emergence holes of the 
GRAIN SUBJECT TQ. ADTACK: Angoumois grain moth. 
Remember that un- 
thrashed wheat, rye, 
The Angoumois grain moth feeds both in — °ats, or barley are not 
aeicd aid =~ z Pt dae 1 ee ; at all protected from 
grains in storage and in grains matur- the moth. 
185282°—20-——2 
