February, ’18] 
KING: BIOLOGY OF ANGOUMOIS MOTH 
91 
tions—providing the grain remains unthreshed in the mow and severe 
cold weather is delayed. 
Farm Practice Favorable for the Moth 
A common farm practice in the region under consideration is to 
store the unthreshed wheat in the mow until some future time when 
threshing is convenient, or to thresh the grain only as there is need for 
the straw. This method of storing grain in the exceptionally tight and 
well-built barns, which are characteristic of this region inhabited by 
Pennsylvania Dutch, is conducive to a most rapid development of the 
moths. During the month of August, wheat in the mow of one of these 
Fig. 5. Map of Pennsylv ania with shaded area showing region of severe Angoumois 
infestation. 
infested barns retained an almost constant temperature of eighty to 
eighty-five degrees F., and during September a temperature of seventy 
to seventy-five degrees F. This so stimulated growth that by the end 
of October as many as five generations had been reared (Fig. 4). 
Control Measures 
The greatest step in the control of this pest will be accomplished as 
soon as the Pennsylvania farmers see the fallacy of storing unthreshed 
grain for long periods in the mow, and will thresh as soon after harvest 
as possible. Grain stored in tight granaries, or in good sacks, is less 
liable to repeated attacks of the moth, and may be easily treated with 
carbon bisulphid. Further, attention to thorough barn sanitation, by 
the elimination or complete utilization of all scattered wheat, is of 
