54 
A similar study, was made of the adjoining small field of rapidly maturing crop 
corn, with the following results : 
Plant. 
Ears. 
Larvae. 
1 
Bored* 
Bored 
Bored 
1 
o 
1 
1 
1 
Bored 
Bored 



1 
2 
1 
U 



2 
3 
4 
5 
G . 
7 
8 
1) 
10 
Total 
11 
4 
*By bored is meant that a worm had been in the ear but had left, either for another ear or to pupate. 
Inasmuch as eggs were found quite plentiful upon the trap corn and none were 
found upon the other, it is apparent that the moths had chosen between the two. 
The number of plants and ears, such as the females would readily deposit upon, 
was counted. One row contained 148 plants with 267 ears. Each of the remaining 
rows was of the same length (about 10 or 15 rods) and contained approximately the 
same number of plants and ears. From the count of the number of worms in the ears 
of this trap corn, as above given, an average of 2.8 worms per ear is derived. There- 
fore the above row contained about 747.6 worms. For the eight rows of trap corn in 
this field, this makes 5,981 as the approximate number of worms trapped. This leaves 
out of consideration the unhatched eggs found in the silks at that time. 
May 23 a second trap planting was made, in a field immediately to the right of the 
first experimental field. By July 6 it had not yet tasseled, though it was badly in- 
fested with another species which was feeding in the buds, just as the Boll Worm 
does. 
Later, about the 1st of August, the second experimental field had silked and was 
well stocked with boll-worm eggs, many of which were parasitized. The larvae 
were plentiful in the ears, and as nothing of further interest could be attached to 
the experiment, Mr. Curtis cut the corn and fed it for forage. 
Experiment 3. 
[Mr. J. H. Fnllilove's plantation.] 
Corn was planted April 13. May 7 it was still small. No Boll Worms in the 
young plants. Two hundred yards away was a field of corn which had been planted 
much earlier. In this a few young Boll Worms were found. July 3 the ears of the 
trap corn were badly infested with Boll Worms and many unhatched eggs were 
upon the silks. The conditions in general were much the same as in the preceding, 
and need not be repeated in detail. 
Experiment 4. 
[Mr. S. J. Ziegler's Plantation.] 
One field was rather more upland and less favorable for a good growth of iate- 
planted corn. The first planting of corn was April 9. April 24 the corn was from 
4 to 6 inches high, but contained no Boll Worms. It tasseled and silked subse- 
quently and the ears were badly infested. 
June 29 the second row was planted. July 28 the plants were 10 to 15 inches high, 
and had boll- worm eggs upon the leaves. The weather had been very dry during 
July, and the corn made an unsatisfactory growth, few plants producing ears with 
large flowing silks, 
