18 BULLETIN 363, U. S. DEPARTMENT OF AGRICULTURE. 
It would be an added measure of safety if a watchman were 
kept on guard on the premises from the time the application is 
made until ventilation is complete. It would also be well to place 
large ‘‘DANGER”’ signs on the doors. 
OTHER REMEDIES. 
Among other remedial measures storage of corn in large bulk is 
recommended, since the surface layers of shelled corn or other grain 
are most exposed to infestation while the lower portions are not so 
apt to be injured, if at all. The larve could penetrate corn in the 
ear to a considerable depth, but, as their hfe is short, this is probably 
seldom done. The moths are unable to do so. Agitation applied to 
a mass of grain is also destructive to the moths, since they are unable 
to extricate themselves and perish in the attempt. Cold storage 
may be employed for valuable seed corn, and naphthalene balls may 
be used for the same purpose. The most scrupulous cleanliness 
should always be observed, much injury due to stored grain insects 
being directly traceable to disregard of this. Old grain and refuse 
material containing sweepings of grain, dust, dirt, and rubbish in 
general should not be allowed to accumulate and serve as breeding 
places for injurious insects. 
In conclusion, it should be stated that promptness is absolutely 
necessary for the control of the pink corn-worm and that bisulphid 
of carbon can not be profitably used in open cribs, so that if this 
insect continues its ravages it may be necessary to construct special 
fumigating buildings and to store the corn in tighter receptacles than 
the cribs and bins now used. 
SUMMARY. 
1. The so-called pink corn-worm is not a true worm, but the cater- 
pular or larva of a minute moth known as Batrachedra rileyi. 
2. Attack on corn begins in the field and continues after the corn 
has been stored. When the stored product is husked, the infested 
ears show injury by accumulations of webbing and frass or excre- 
mentitious matter. A careful inspection discloses the ‘‘ pink worm.” 
3. The eggs are deposited in the field where the tips of the corn 
ears are more or less open, due to the attack of the corn-ear worm. 
After the latter has departed the pimk corn-worm continues the 
injury and by its work makes it easy for other insects and water to 
enter the ears, which eventually are ruined. 
4. From the cob or between the rows of grains the worm pene- 
trates the kernels at the tip or point of attachment, works into the 
embryo or ‘“‘germ,”’ which it destroys, then outward to the crown. 
5. Unlike the Angoumois grain moth and the rice weevil, which 
are usually to be found working in the same fields and frequently in 
