58 
data were obtained with collections of these smuts on the Fulghum 
type of oats. Through the cooperation of Mr. T. R. Stanton, 
Office of Cereal Crops and Diseases, Bureau of Plant Industry, 
Washington, D. C., we now have 10 collections of loose smut from 
different parts of the South, where Fulghtum oats are extensively 
erown, These collections have been tested out on a number of 
different varieties, and their behavior determined. We have been 
able to demonstrate clearly that there are at least two distinct races 
of loose smut specialized to the Fulghum oats. These are dis- 
tinguished on the basis of their ability to mfect particular oat 
varieties. 
‘hree collections of covered smut on Fulghum oats have been 
obtained from the South. One of the most interesting features 
of these collections is their ability to infect Black Mesdag, a va- 
other known collections of both Toose and 
r 
— 
eb) 
— 
riety resistant to al 
covered smut. 
Bunt of IWheat 
Additional experiments were carried out with several physiologic 
races of bunt of wheat. These were tested on wheat varieties 
which have shown differences in their reaction to specialized races 
of the two species of bunt. The particular purpose of the ex- 
periments was to determine whether certain wheat varieties were 
identical in their behavior to the various races, or whether these 
varieties could be separated from each other on the basis of their 
infection by distinct races of bunt. 
Sorghum Smuts 
Miss D. Elizabeth Marey has continued her studies on the in- 
heritance of resistance of various sorghum hybrids to the covered 
kernel smut of sorghum. The second generation plants of 18 
sorghum crosses were grown, each cross being represented by 50 
to 100 plants. On the basis of the behavior of the parental varie- 
— 
ties, the crosses may be divided into three groups: 
1. Both parents resistant. There were two reciprocal crosses 
between Veterita and Dwarf Yellow Milo, varieties which have 
consistently been resistant to the covered kernel smut. All of the 
inoculated second generation plants remained entirely free from 
infection. 
