256 
Journal of Agricultural Research 
Vol. XXIV, Na » 
With the exception of the plants labeled Saccharum narenga, these 
varieties are all very similar, and some of them may be identical. They 
are of the slender North India type and probably have a common origin, 
but this experiment proves that not all varieties of this type are immune 
to mosaic. Varieties from India, China, and Japan proved to be sus- 
ceptible. They are apparently scarcely injured by the disease. The 
le^ symptoms are much less conspicuous than in the thick-stalked 
varieties of sugar cane, and there is no evidence of stunting. In this 
respect they are like the well-known Java seedling varieties resulting 
from crosses between the Chunnee ^ and Striped Preanger 9 and between 
Chunnee and Black Cheribon 9 . 
THSTS WITH CORN VARIETIES 
That some varieties of com are severely injured by grass mosaic was 
shown by the senior writer in 1920 (4). In 1921 a large number of corn 
varieties were tested in southern Georgia for immunity or resistance to 
the disease. The first experiment included 40 varieties of field, sweet, 
and pop corn from all of the com sections of the United States.^ About 
25 plants of each variety were grown near the center of a field of first 
ratoon Lbtdsiana Purple sugar-cane plants, more than half of which were 
mos2Uc. Seeds were planted in the field on April 15, 1921. On July 15, 
1921, the plot was examined and notes were taken on the percentage of 
iiiected plants in each variety. The results are given in Table V. 
TABm V .—Results of tests for resistance to mosaic of varieties of corn planted on April 
15, 1921 
Variety. 
Source of seed. 
Per¬ 
cent¬ 
age of 
mosaic 
on 
July 15, 
1921. 
Variety. 
Source of seed. 
Per¬ 
cent¬ 
age of 
mosaic 
on 
July 15^ 
1921. 
Nflriv^ I. 
Georgia.. 
20 
Clarage (U. S. Selection 
Maryland. 
0 
Pop*' Prnlifip . 
Florida. 
20 
No. 125). 
U. S. Selection No. 165.. 
TT'exa*?. 
35 
Boone County (U. S. 
Nebraska. 
0 
U. S. .Selection No. 170 .. 
__do.. 
40 
Selection No. 159). 
T.ocrfin£i . 
__do. 
10 
St. Charles (U. S. Selec¬ 
0 
Brazos. 
5 
tion No. 202). 
ATlirio+mi 'Pmti'fip 
Mississippi. 
17 
Lancaster Surecrop...... 
Illinois... 
0 
PpH Coh . 
.do. 
10 
U. S. Selection No. 160... 
California. 
15 
"PmUfip . - . 
Georgia. 
20 
Orange County Prolific.. 
.do. 
IS 
Whatley Prolific. 
.do.... 
15 
U. S. Selection No. 204... 
South Dakota.. 
10 
ripffirlc, . 
South Carolina. 
12 
Northwestern . 
North Dakota,. 
0 
TT 5 % Selertioti No aoi 
Arkansas . 
12 
Gehn . 
.do . 
0 
Florida. 
20 
Pearl . 
0 
{station Vellow, . , . 
Alabama. . 
0 
U. S. Selection No. 133 . . . 
Wisconsin . 
0 
pitigletoo T. 
Texas. .. 
0 
Hall Gold Nugget vU. S. 
New York. 
0 
Huffman ... 
Tennessee . 
10 
Selection No. 193)* 
TT A TjTo ^70 
"^rirgiriin 
e 
Arlington Peruvians . 
Virginia . 
15 
• W* XV • • • 
Soone Countv S* 
, do. 
0 
10 
Pueblo Black . 
New Mexico.... 
0 
White Pice. 
Virginia . 
4 
wdcccxi/jLi xv !./• xxy/* 
U S Selection No 120 
do , . 
0 
Yellow Pearl . 
4 
U. S. Selection No. 182. .. 
. do .. 
10 
Hull-less . 
Michigan . 
0 
fTJ S Sdco 
Ohio 
0 
Golden Bantam . 
Virginia . 
0 
VV UViXUUXXX v^* w* WCICV 
tion No. 77). 
Coimtry Gentleman. 
0 
Twenty-three of the 40 varieties became affected with mosaic in this 
experiment. All varieties from the Southern States excepting 4, which 
later proved susceptible, were more or less affected by the disease; but 
^ The seed of these varieties was furnished through the courtesy of the Office of Cereal Investigations, 
U. Department of Agriculture. 
