THE ARMY WORM IN CRANBERRY BOGS 15 
following remedy against this pest: In company with another person he drags a long 
rope across the bog, thus driving away many of the locusts, or at least disturbing 
them. He says that if this operation were repeated about twice each day the damage 
would be considerably reduced, as the disturbed locusts do not settle down again to 
their destructive work until after the lapse of several hours. 
No “berry moth” could be observed on Mr. Rockwood’s cranberry farm, but con- 
Siderable damage had been done earlier in the season by another Tortricid larva, 
which webs together the terminal leaves of the young vines. At the time of my visit 
not a single living specimen could be found, buf I believe that an additional flooding 
of the bogs would prove a good remedy for this pest. 
Respectfully, 
E. A. SCHWARZ, 
Assistant. 
ProkG. Vi. RILEY: 
U. S. Entomologist. 
A careful examination of the more or less irrecognizable specimens 
found by Mr. Schwarz left little doubt in our minds that the species 
was the genuine Army Worm, a few of the heads making this decision 
possible. 
It is evident from the facts observed by Mr. Schwarz that the moth 
had flown from some distance, for the records for that year, as indicated 
in our last report, show that the insect was quite prevalent throughout 
that portion of the United States at the time. 
REMEDIES.—It follows from the facts obtained that one of the best 
ways of preventing injury to cranberries in the future is to keep the bog 
as free as possible from foreign plants,and that the injury may be limited 
by increasing the number of irrigating ditches and by keeping these free 
from weeds and other obstructions. 
Another method to prevent the recurrence of such invasion of the 
Army Worm suggest itself: The water is drawn off from the bog 
on May 10, and the plants not flooded again for the rest of the season. 
The irrigating ditches are then only kept filled with water in given quan- 
tities, according to the character of the season. Now, the water can be 
drawn off earlier than has hitherto been done, without injury to the 
plants, and, what is more important in this connection, the water can 
be let on again without injury to the plants at any time before bloom- 
ing, 7. e., about the last week of June. If the eggs are laid by the moths, 
as was evidently the case in 1882, during the month of May, it is ap- 
parent that a flooding of the bog some time during the month of June 
(the water to be kept on the bog, say, for about two days) would drown 
out the worms before they have begun to do the damage. 
Wherever an abundant water supply is at command in spring and 
early summer, and under control, as is the case on the cranberry farms 
near Hammonton, a repetition of the damage done by the Army Worm 
could thus easily be avoided. Should the worm appear during or after 
the blooming season little or nothing could be done against it; but it is 
probable that at this time the damage done by the worms would be much 
less serious than earlier in the season, as the leaves on the bearing vines 
will then be too hard to be very attractive. 
