16 BULLETIN 1299, U. S. DEPARTMENT OF AGRICULTURE 
Of the entire list of common wheats which were grown in all three 
States for two years only two remained bunt free. These were 
Hussar (Red Hussar), C. I. No. 4843, a hard red winter wheat, and 
Martin (Martin Amber), C. I. No. 4463, a white wheat. 
None of the hard red spring wheats was especially resistant to bunt, 
although Ruby had an average bunt infection of only 11.5 per cent. 
Besides Hussar, which was immune, other hard red winter wheats 
showing a high degree of resistance are Minturki (C. I. No. 6155), 
Kanred (P-1066 and P-1068), and Rieti (C. I. No. 2578). 
Two strains of Odessa (C. I. Nos. 4473 and 6035) were the only 
soft red winter wheats showing distinct resistance to bunt, and these 
were grown only at Davis. 
Besides Martin, which was immune, other white wheats showing a 
high degree of resistance were White Odessa (C. I. No. 4481-C), 
which had an average of 0.2 per cent bunt, and other selections of the 
same variety (C. I. Nos. 4651 and 4655), which were infected only 1.1 
and 2.4 per cent, respectively. 
SELECTIONS 
In 1916 at Moro, 134 selections of hard red winter wheat were 
grown in the classification nursery. These were tested for yield in 
the nursery at Moro in 1917 and 1918 and were sown in the bunt ex- 
periments in the fall of 1918. The complete results are not tabulated, 
but several of the selections proved somewhat resistant to bunt. 
Detailed data are shown later (Table 8) for eight of the most 
resistant of these selections, which were continued in the experiments 
during the three seasons following. 
In the season of 1919-20 seed from 168 head selections of Pacific 
Bluest em (White Australian) wheat was smutted with spores of 
Tilletia tritici and sown in the experiments at Davis. The original 
head selections were collected from a large number of fields in the 
Sacramento Valley in 1917 by J. Allen Clark and E. L. Adams, of the 
Office of Cereal Investigations. They were grown in the nursery at 
Chico, Calif., where the seed for these experiments was obtained. 
The results from this single season's experiments show little proba- 
bility of finding bunt-resistant strains of this variety through, head 
selection. The lowest percentage of bunt in any selection was 78, 
and most of them showed more than 90 per cent of infection. 
CLUB WHEATS 
Data showing the results obtained with club wheats are presented 
in Table 2. These wheats had an average infection of 68.4 per cent 
and therefore are highly susceptible to bunt. As a group the varie- 
ties are more uniformly susceptible than are the common wheats. 
The lowest percentage of bunt shown by any variety or selection was 
9.2 per cent, by a field selection (C. I. No. 4669) which closely resem- 
bles Hybrid 3. The next lowest percentage, 32.3, was shown by 
Hybrid 3 (C. I. No. 4239). 
