June, ’23 
mccolloch: hessian fly, resistant wheat 
295 
to an intensive study of this variety. The bulk crop as grown in the 
field was found to consist of a heterogenous mixture of types and a 
large series of pure lines were selected and propagated. Tests were 
conducted in the field at Manhattan and Hays, and in the greenhouse, 
with 54 of these pure lines, and, with the exception of two strains, all 
Table I—Showing the Average Tercentage of Plants Infested in the Fall, at Harvest, 
and Under Greenhouse Conditions 
Variety 
No. 
Kind of wheat 
Fall Infestation 
Harvest Infesta¬ 
tion 
Greenhouse 
2 tests 
Aver, percent 
infestation 
No. 
tests 
Aver, percent 
infestation 
No. 
tests 
Aver, percent 
infestation 
Marquis. 
Spring 
6 
19.3 
52.3 
Kanred. 
2401 
Hard Red Winter 
9 
25.0 
4 
38.7 
40.8 
Kharkof. 
382 
t i it it 
8 
32.5 
3 
44.0 
33.2 
Turkey. 
570 
n tt tt 
10 
27.8 
4 
58.7 
62.9 
Red Winter. 
2101 
tt tt a 
9 
24.0 
3 
40.0 
57.5 
tt tt 
2132 
tt a tt 
10 
8.2 
4 
24.7 
24.9 
Alberta . 
2105 
tt tt tt 
9 
19.4 
3 
41.3 
Defiance. 
2123 
tt it tt 
9 
30.6 
3 
30.7 
Old Crimean. 
846 
tt tt tt 
5 
24.0 
4 
32.0 
Alberta. 
2048 
a tt tt 
4 
13.0 
3 
30.7 
36.8 
Clark Blackhull. . . 
306 
tt tt tt 
4 
17.0 
2 
10.5 
20.6 
Beechwood hybrid. 
100 
Soft Red Winter 
10 
2.2 
4 
23. 
10.0 
Miracle. 
106 
it tt tt 
9 
4.0 
2 
6.5 
9.3 
Currell Prolific.... 
90 
it tt tt 
9 
7.1 
2 
2.5 
5.8 
Currell Selection.. . 
2406 
tt tt tt 
10 
4.4 
4 
19.0 
Harvest Queen.... 
19 
it tt it 
9 
4.2 
3 
12.0 
Valley. 
70 
tt tt tt 
8 
4.2 
2 
14.0 
Rudy. 
77 
tt it it 
10 
6.0 
4 
23.2 
0.0 
Dietz. 
84 
it tt it 
10 
2.6 
3 
6.6 
0.0 
Illini Chief. 
223 
a tt a 
• 
9 
1.3 
4 
17.5 
5.5 
Zimmerman. 
2084 
(4 44 44 
8 
32.2 
42.0 
Fulcaster. 
83 
44 44 44 
7 
4.0 
31.4 
Mich. Bronze. 
2365 
Soft White Winter 
9 
4.0 
2 
59.5 
Dawson Golden 
Chaff. 
78 
44 44 44 
10 
1.8 
4 
1 1.0 
14.9 
showed the same resistance as the bulk crop. Two strains, No. 3278 
and No. 3291, had a relatively high infestation at Hays and in the 
greenhouse, the latter strain being especially susceptible. A study of 
this strain shows that it differs from all the others, in that the grain is 
hard and vitreous in texture and resembles a hard winter wheat. 
