MOSAIC OF SUGAK CANE AND OTHER GRASSES. 3 
Table I. — Tests of sugar cane, showing varietal resistance to the yellow-stripe (mosaic) 
disease in the Hawaiian Islands. 1 
Variety. 
Plant cane 
old): 
H227... 
(18 months 
H151. 
H135. 
H90. 
H27. 
H2. 
H197. 
H276. 
H291. 
H338. 
H355. 
First ratooned cane (11 
months old): 
H363 
H197. 
H109. 
Condition. 
/Striped 
\Healthy... 
/Striped.... 
(Healthy... 
/Striped.... 
\Healthy... 
/Striped.... 
\Healthy... 
/Striped.... 
\Healthy... 
/Striped.... 
\Healthy... 
/Striped 
\Healthy... 
/Striped.... 
\Healthy... 
/Striped.... 
\Healthy... 
/Striped.... 
(Healthy... 
/Striped.... 
\Healthy... 
/Striped.... 
\Healthy... 
/Striped.... 
\Healthy... 
/Striped — 
\Healthy... 
H27. 
Yellow Caledonia. 
H22. 
/Striped.. 
(Healthy. 
/Striped.. 
I Healthy. 
/Striped.. 
\Healthy. 
/Striped.. 
(Healthy. 
/Striped.. 
(Healthy. 
/Striped.. 
(Healthy. 
/Striped.. 
(Healthy. 
/Striped.. 
(Healthy. 
Canes. 
Num- 
ber. 
212 
50 
248 
50 
292 
57 
244 
38 
265 
16 
296 
39 
172 
16 
174 
34 
154 
32 
196 
79 
185 
20 
191 
15 
126 
219 
70 
75 
66 
58 
310 
109 
288 
84 
213 
243 
31 
16 
372 
260 
68 
24 
345 
Aver- 
age 
weight, 
Pounds. 
4.10 
5.17 
5.73 
6.57 
5.69 
6.96 
5.50 
7-08 
4.50 
6.12 
5.12 
5.60 
8.03 
9.16 
4.00 
6.39 
6.34 
6.90 
6.01 
6.96 
4.05 
5.10 
4.00 
5.50 
4.03 
5-25 
5.25 
6.03 
4.73 
5.13 
2.80 
3.60 
3.99 
3.96 
3.50 
4.08 
4.89 
6.51 
2.56 
3.66 
3.09 
4.37 
4.10 
4.73 
Test of juice. 
Brix 
scale. 
Beg. 
18.5 
18.0 
18.4 
18.8 
17.3 
17.2 
18.5 
18.3 
18.7 
18.8 
19.3 
18.8 
19.1 
18.7 
18.8 
18.5 
19.0 
18.8 
18.1 
18.2 
20.0 
19.8 
19.8 
20.2 
16.7 
17.7 
18.8 
19.2 
19.3 
19.2 
19.9 
20.3 
19.5 
19.9 
19.0 
19.1 
18.5 
19.6 
19.7 
19.1 
17.6 
17.8 
19.3 
19.9 
Su- 
crose. 
Percent, 
16.7 
16.2 
16.5 
16.9 
15.7 
15.4 
16.6 
16. 3 
16.6 
16.6 
17.7 
17.2 
17.1 
16.7 
16.9 
16.4 
17.1 
16.8 
15.7 
. 15.8 
18.1 
17.9 
17.6 
18.0 
14.5 
15.4 
15.5 
15.7 
17.2 
17.2 
18.2 
18.7 
17.9 
18.2 
16.7 
16.8 
16.4 
17.5 
17.8 
17.0 
15.2 
15.5 
17.3 
18.1 
Pur- 
ity. 
Per cent 
90.3 
90.0 
89.7 
89.9 
90.8 
89.5 
89.7 
89.1 
88.8 
88.0 
91.7 
91.5 
89.5 
89.3 
90.0 
89.4 
86.7 
90.5 
90.4 
87.0 
82.4 
81.8 
89.1 
89.6 
91.5 
92.1 
91.8 
91.5 
87.9 
88.0 
88.6 
89.3 
90.4 
89.0 
86.4 
87.1 
89.6 
91.0 
Requirement 
per ton of 
sugar. 
Weight 
of 
cane. 
Tons. 
7.81 
8.07 
7.95 
7.73 
8.29 
8.52 
7.90 
8-07 
7.92 
7.96 
7.33 
7.55 
7.67 
7.86 
7.73 
8.04 
7.64 
7.81 
8.49 
8.41 
7.21 
7.29 
7.47 
7.31 
9.17 
8.63 
8.81 
8.73 
7.65 
7.63 
7.13 
6.91 
7.22 
7.13 
7.91 
7.86 
8.04 
7.50 
7.33 
7.74 
8.77 
8.57 
7.08 
7.19 
Num- 
ber of 
3,810 
3,122 
2,775 
2,353 
2,914 
2,448 
2,873 
2,280 
3,520 
2,606 
2,863 
2,696 
910 
71i) 
Mi.-) 
517 
410 
264 
825 
417 
3', 561 
2,859 
3,735 
2,659 
4,551 
3,288 
3, 356 
2,895 
Loss 
due to 
disease. 
N> j 
3,235 
2,975 
5,090 
3,840 
3,619 
3,601 
4,520 
3,853 
3,288 
2,304 
5,727 
4,229 
5,676 
3,693 
3,454 
3,040 
Per cent. 
18.05 
15.20 
15.97 
20.64 
26.09 
5.83 
10.16 
34.9 
6.06 
14.46 
19.7 
46.45 
27.76 
13.72 
8.04 
24.63 
.5 
14.76 
29.93 
26.1 
30.9 
11.97 
1 Lyon, H. L. Losses due to yellow stripe disease. In Hawaiian Planters' Rec, v. 6, No. 5, p. 258-263, 
1912. (Permission to use the data in this table was obtained from the editor of the Hawaiian Planters' 
Record.) 
2 H= Hawaii seedling. 
Table I indicates clearly that the loss is due almost entirely to 
reduced tonnage. Diseased canes are uniformly much lighter than 
healthy canes of the same variety. 
During the early part of the present year the mosaic disease was 
discovered by the writer at three different points in Cuba, apparently 
as the result of separate importations. At Cienfuegos it has been 
present for nearly 20 years, but as a result of discarding diseased 
plants in the seedling and propagating fields because of their unthrifty 
appearance, and perhaps partly owing to the fact that a proper agent 
