790 
Journal of Agricultural Research 
Vol. XXIII, No. 10 
VARIETAI, RESISTANCE 
Extensive studies of varietal resistance have been made during the- 
past two seasons. Many of the eastern wheat varieties have been grown 
on infested soil, and the disease has been controlled perfectly where re¬ 
sistant varieties have been used. 
In 1919-20, 10 local varieties of wheat adapted to central Illinois 
were sown on uniformly infested land near Granite City, Illinois. The 
varieties were sown in adjacent parallel strips a drill-width (54 inches) 
wide and 50 rods long. The essential part of the writer’s results from 
these experiments were first published by Reed and Dungan (27). 
Later the results were published by the writer 17 and by Humphrey, 
Johnson, and McKinney (jo). These data are also given at this time 
in Table VII. 
In 1920-21, 150 varieties and selections of winter wheat 18 were tested 
for susceptibility. Most of these were eastern varieties obtained from 
Dr. C. E. Leighty, of the Office of Cereal Investigations, but several were 
received from Mr. G. H. Dungan, of the Illinois Agricultural Experiment 
Station. All were sown by hand in rows 8 inches apart and 1 rod long, 
on uniformly infested land near Granite City, Ill. The varieties ob¬ 
tained from the Office of Cereal Investigations were sown in double 
rows and those received from the Illinois Agricultural Experiment Sta¬ 
tion were sown in single rows. A local susceptible variety, Harvest 
Queen (white-chaffed Red Cross), from a disease-free field was sown 
after every tenth variety throughout the series to serve as a control 
upon the uniformity of soil infestation. All control rows showed from 
90 to 95 per cent of the rosette disease in the spring. Table VIII gives 
the list of varieties and selections and the percentage of disease develop¬ 
ing in those which showed susceptibility. Owing to the limited size of 
these plots and to the fact that the stand in many of the plots was 
rather irregular, due to the very dry fall of 1920, yields were not taken 
on this series. Observations were made, however, on the general thrift 
of the varieties. 
The outstanding feature of this experiment is the fact that only 6 per 
cent of all varieties showed susceptibility to the disease. 
17 McKinney, H. H. resistance in wheat to the so-called take-all disease. In U. S. Dept. Agr. 
Bur. Plant Indus. Off. Cer. Inves. Cereal Courier, v. 12, no. 17, p. 229-231. 1920. Mimeographed. 
18 In a recent publication on classification of American wheat varieties (Clark, J. Allen, Martin, John 
H., and Ball, Carleton, R. Classification of American wheat varieties. U. S. Dept. Agr. Bui. 
1074, 238 p., 76 fig., 60 pi. 1922. Literature cited, p. 219-230), published since this paper was prepared, the 
following nomenclature has been proposed for certain of the varieties included in these experiments. In 
the following list the names used in this paper precede the corresponding ones used in the work cited: Amer¬ 
ican Bronze= Prosperity; Budapest* Pesterboden; Crimean* Turkey; Dietz Longberry* Fulcaster; 
Early Harvest* Red May; Early May* Flint; Early Ripe* Red May; Enterprise* Red May; Eversole* 
Fulcaster; Ghirka Winter* Alton; Harvest King— Poole; Hedge Prolific* Poole; Hungarian* Pesterboden; 
Indiana Swamp* Valley; Lancaster*Mediterranean; Malakof* Turkey; Michigan Amber* Red May; 
Michigan Wonder* Red May; Miller's Pride* Mediterranean; Minnesota Reliable* Turkey; Missouri 
Bluestem* Mediterranean; Niagara* Gipsy; Orange* Red May; Pearl Prolific*Currell; Pennsylvania 
Bluestem*China; Pride of Indiana* Red May; Red Cross* Red May: Reliable* Gipsy; Stoner (Marvel¬ 
ous)* Fulcaster; Stoner* Fulcaster; Super (Burbank’s)* Jones Fife; Theiss* Turkey; Velvet Chaff (Pen- 
quite)* Penquite; Winter Fife* Jones Fife; Worlds Champion* Turkey. 
