SORGHUM SMUTS AND VARIETAL RESISTANCE 35 
milo from the United States Department of Agriculture and after 
inoculation with spores of S phacelotheca sorghi and S. cruenta sowed 
it on the Agricultural College Farm at Poona, India. Apparently 
the same lot of seed was inoculated with the spores of both smuts. 
A total of 645 heads was obtained, of which three were infected by 
S. sorglii (0.47 per cent infection) and 50 by S. cruenta (7.8 per cent 
infection). The three plants infected by S. sorghi may have been 
some other sorghum, but the rather high percentage of infection 
with S. cruenta scarcely can be thus explained. Possibly Dwarf 
Yellow milo is susceptible to S. cruenta, although Potter (91) and 
Reed (97) have reported negative results. 
Feterita was imported into the United States in 1901 from Alex- 
andria, Egypt. A second importation was made in 1906, also from 
Alexandria, although the seed originally came from the Sudan. In 
1908 an additional supply was obtained from Khartum, Sudan, 
where it was known as Sudan durra. 
Feterita is similar to milo in most of the characters of the stalks 
and leaves. Under Texas Panhandle conditions it averages about 
5 feet high, or about 1 foot taller than Dwarf Yellow milo. The 
panicles are erect, the seeds chalky or bluish white, and the glumes 
dark brown to black. Since its introduction it has been improved 
by selection and for some sections is a desirable sorghum. Dwarf 
feterita is a selection from the improved strain made by H. N. 
Vinall in 1909. The plant originally selected was only 2)4, feet 
high and was fully mature two weeks earlier than the general crop. 
This strain has not fully retained either its dwarfness or its earliness. 
Spur feterita is a strain developed at the Spur substation in Texas. 
Twelve different strains of feterita, including Dwarf feterita and 
Spur feterita, have been grown in the smut experiments at the 
various stations. (Table 7.) These have all proved to be strik- 
ingly resistant to the covered kernel smut. No infections have 
been noted in a total of 1,472 plants of C. I. No. 182 grown during 
three years at Amarillo and six years at Manhattan. Six different 
strains were grown at Columbia. Out of a total of 1,138 plants 5 
were recorded as infected. As mixtures sometimes occurred, pos- 
sibly the smutted plants were other varieties of sorghums present 
in the rows which could not be identified. Out of 277 plants grown 
at Brooklyn, 2 were smutted. There seemed to be no question 
about the identity of these smutted heads, for some seeds developed 
in both cases which were typical feterita. In any case feterita has 
been shown to be very resistant to the kernel smut, and the results 
verify the frequent observations that have been made as to the 
freedom of this sorghum from smut in the field. 
RESULTS WITH MISCELLANEOUS SORGHUMS 
A number of additional sorghums, for the most part hybrids 
between various members of the commonly recognized groups, have 
been grown in these experiments. Data from the inoculation experi- 
ments on these sorghums are presented in Table 8. 
