RELATIVE RESISTANCE OF WHEAT TO BUNT 
23 
RESULTS WITH SOUTH AFRICAN WHEATS 
Twenty-eight varieties of wheat obtained from different parts of 
South Africa were grown in the bunt experiments at Davis, Calif., in 
1920 and 1921. An unnamed variety, C. I. No. 6165, snowed the 
lowest average infection, 22.5 per cent. All other varieties showed 
40 per cent or more. The data are presented in Table 6. 
Table 6. — South African wheat varieties grown from smutted seed at Davis, Calif., 
showing the percentages of bunted heads in 1920 and 1921 
C.I. 
No. 
Percentages of 
bunted heads 
Variety 
C.I. 
No. 
Percentages of 
bunted heads 
Variety 
Davis, 
Calif. 
Aver- 
age 
in all 
station 
years 
when 
grown 
Davis, 
Calif. 
Aver- 
age 
in all 
1920 
1921 
1920 
1921 
station 
years 
when 
grown 
6118 
6052 
6056 
6075 
6092 
6069 
6119 
6123 
6127 
6072 
6058 
6068 
6093 
6061 
79.4 
80.9 
76.9 
93.6 
88.0 
47.8 
56.3 
69.1 
69.1 
83.8 
83.1 
83.4 
82.7 
66.8 
64.6 
53.0 
63.5 
78.-8 
66.5 
37.9 
70.7 
55.1 
• 66.9 
58.2 
71.0 
59.2 
66.1 
54.2 
72.0 
67.0 
70.2 
86.2 
77.3 
42.9 
63.5 
62.1 
68.0 
71.0 
77.1 
71.3 
74.4 
60.5 
Rooi Kaal . . _ 
6070 
6107 
6071 
6063 
6121 
6065 
6073 
6079 
6096 
6097 
6099 
6105 
6165 
55.1 
79.4 
81.0 
85.0 
84.4 
83.0 
74.3 
82.7 
85.3 
88.6 
83.8 
80.9 
39.0 
59.3 
65.1 
52.2 
71.7 
71.8 
56.5 
"46.5 
57.3 
62.9 
82.0 
66.4 
72.4 
6.0 
57.2 
Rooi Wolhaar 
72.3 
Du Toit's 
66.6 
Talawair . 
78.4 
Do 
Transvaal Wolhaar 
Wit Baard 
78.1 
69.8 
Do . 
Wolhuter . ... _ _. 
60.4 
Geluks 
(No name) 
70.0 
Malan's or Spring 
Klein 
Do 
74.1 
Do 
85.3 
Do 
75.1 
Do 
76.7 
Do 
Do 
22.5 
RESULTS WITH MISCELLANEOUS WHEATS 
Some selections and varieties have been included in these experi- 
ments which do not belong to any of the groups for which tabulated 
data have been presented. They are not commercial American 
varieties or varieties from Australia, India, or South Africa. They 
comprise selections and hybrids made in this country and a few 
foreign wheats. 
Table 7 presents the detailed percentages of infection in these 
wheats. Most of them are very susceptible. Six hybrid selections 
show high resistance in a 2-year experiment at Davis, Calif. Three 
hybrids resulting from a cross between Turkey and Hybrid 128 are 
very resistant, while three derived from a cross between Turkey 
and Florence, a resistant Australian wheat, are immune_ or nearly 
so. Ridit (see Table 8), the highly resistant commercial hybrid 
being distributed from the Washington Agricultural Experiment 
Station, was derived from the cross between Turkey and Florence. 
