INJURIOUS INSECTS OF 1909 AND IQIO. 7 
beetles, by birds, and die on account of fungous or bacterial diseases. 
Nevertheless, these factors simply serve to keep them within 
bounds, and it is absolutely necessary, when a farmer is confronted 
with a horde of these worms stripping his timothy field, and pre- 
paring to march to grain fields, to know what to do ,and to realize 
that whatever is to be done must be done without delay in order to 
be effective. Fall plowing and the rotation of crops, sovereign 
remedies for many field-insects, are valuable here. If farmers would 
plow up their timothy fields at least once in three years, it would be 
a help in connection with this or any other insect which found there 
an undisturbed breeding-ground. Another year, quite possibly, this 
army worm might not originate in timothy, but be found begin- 
ning its depredations on some other crop. Its repression, there- 
fore, appears to be dependent upon proper farm practice. In cases 
of serious infestation, as in the present instance, when a farmer’s 
crop is threatened by these worms, and the land is in a condition 
to allow it, he should plow one or two deep furrows across the line 
of march of the worms, the steep side of the furrows toward the 
crop to be protected. The worms collect in the furrows and can 
be killed with kerosene, or better, with crude oil. If post-holes 
eight or ten inches deep are made at intervals in these furrows, they 
form traps into which the worms fall. Or, the ditch or furrow 
may be partially filled with straw, which may be wet with kerosene 
and burned after the worms have collected thereon. A farmer can 
spray a broad strip about the worms, or across their line of march, 
with Paris green, at the rate of two or three pounds in roo gallons 
of water; or arsenate of lead (better than Paris green) at the rate 
of four or five pounds in 100 gallons of water. Sometimes it is 
practicable to drag a heavy roller over the advancing worms. Dust- 
ing Jry Paris green on vegetation about the worms may be re- 
sorted to. Fields where they are entering the soil to go through 
the resting stage should be plowed—harrowing is not sufficient. 
Co-operation in the attack is necessary; for there might remain on 
one man’s place enough worms to lay waste the entire neighbor- 
hood later on, if every one did not take preventive measures. 
The presence of this worm on cured hay does not poison it for 
stock, as some farmers have supposed. 
From July 11th to 13th, Mr. F. J. Crider of this division was 
in the field. His report in detail follows: 
CONDITIONS AT WORTHINGTON: I was taken out into the field around 
Worthington by Mr. Jones. Spent half a day in this way; talked to several 
farmers of the community in regard to the work of the army worm. Dam- 
