RELATIVE RESISTANCE OF WHEAT TO BUNT 
15 
Table 1. — Classified list of common wheats, chiefly commercial American varieties, 
grown at Davis, Calif., Moro, Oreg., and Pullman, Wash., showing the percentages 
of heads infected with bunt in two or more of the years specified — Continued 
C.I. 
No. 
Percentages of bunted heads 
Variety and synonyms 
Davis 
Calif. 
Moro, 
Oreg. 
Pullman, Wash. 
Average 
in all 
station 
1920 
1921 
1919 
1920 
1919 
1920 
years 
when 
grown 
white wheats— continued 
Touse: 
Touse __ . 
6017 
6019 
6021 
5332 
4412 
4955 
4480 
/4481 
i-c 
4651 
4655 
5230 
5231 
5267 
6010 
4684 
5219 
5224 
5232 
5915 
81.7 
86.8 
91.4 
79.7 
62.5 
56.8 
78.1 
64.8 
2.9 
34.9 
69.3 
Do.... 
82.5 
Ninety-Day 
78.1 
Tread well: 
Treadwell 
91.0 
53.0 
35.0 
78.0 
50.0 
34.5 
50.0 
66.0 
55.9 
White Fife: 
White Fife 
26.1 
55.6 
44.4 
Do.. 
42.5 
White Odessa: 
White Odessa 
35.8 
} t 
. 7 
2.0 
95.5 
86.8 
87.5 
79.7 
88.4 
80.5 
86.1 
83.7 
57.3 
1.5 

2.1 
2.7 
44.6 
38.5 
55.0 
14.9 
37.9 
31.5 
40.4 
71.4 
11.3 
45.3 
Do 
.2 
Do 
1.0 
4.0 
94.0 
80.0 
85.0 

.7 
81.0 
65.5 
92.0 
1.9 
1.1 
Do 
2.4 
White Track. 
78.8 
Do 
67.7 
Do 
93.7 
52.3 
77.6 
White Winter: 
47.3 
White Winter... 
34.0 
75.0 
39.0 
81.0 
93.0 
93.5 
95.5 
73.0 
68.3 
Do. 
70.0 
Do 
64.8 
Do 
77.6 
Windsor: 
56.0 
72.0 
49.2 
72.2 
35.9 
64.9 
71.4 
67.5 
56.8 
60.2 
54 
.1 
67.9 
62.2 
The data in Table 1 show that nearly all varieties of common wheat 
are very susceptible to bunt. There is a difference, however, in the 
degree of resistance possessed by the groups of common wheats when 
each is considered as a whole. The data are not strictly comparable 
but are doubtless indicative. The hard red winter wheats are the 
most resistant, showing an average infection of 22.7 per cent, and the 
white wheats and the soft red winter wheats with average infections 
of 60.2 and 58.8 per cent, respectively, are the least resistant. The 
hard red spring wheats showed an average bunt infection of 50 per 
cent. 
Within each group are found one or more varieties or selections that 
are highly resistant to bunt. There is a greater number of such 
resistant varieties in the hard red winter group than in any other, 
but a few of the more susceptible strains are about as subject to bunt 
as any of those found in the other groups of common wheat. The 
very susceptible hard red winter varieties, Alton and Eureka, are 
awnless and of little commercial importance. If these were omitted 
the remaining varieties, all belonging to the awned Crimean group 
and comprising almost all of the commercial hard red winter wheats, 
would show an average infection of only 10.9 per cent. This is less 
than that of any other class or species of wheat except einkorn. 
