524 
Journal o f Agricultural Research 
Vol. XXX, No. 6 
Table XI. — Effect of different regions on dissemination of mosiac, leaf-roll, and 
spindle tuber in different varieties 
Variety and region 
Location in field, 1922 
Total 
number 
hills 
July 22, 
1923 
Mosaic 
not of 
rugose 
type ® 
Disease 
Ru¬ 
gose 
mosaic 
in 1923 
Leaf- 
roll 
Spin¬ 
dle 
tuber 
Total 
disease 
per¬ 
cent¬ 
ages 
Green Mountain: 
. 
Per cent. 
Per cent 
Per cent 
Per cent 
Per cent 
N. E. Maine--. 
Between rows of Green Moun- 
213 
31 
1 
1 
45 
78 
tains with mosaic and spindle 
tuber. 
S. W. Maine- 
_do. 
149 
32 
7 
39 
Long Island - - 
.do_ . _ . . 
407 
57 
4 
37 
4 
102 
Virginia_ 
_do___ 
b 377 
41 
22 
99 
92 
254 
N. E. Maine_ 
Between rows of Irish Cobblers 
188 
20 
1 
2 
32 
55 
with leaf-roll and spindle tuber. 
S. W. Maine 
..do. _ 
110 
16 
47 
7 
70 
Long Island_ 
_do. 
471 
31 
2 
70 
58 
161 
Virginia__ 
.. ..do. ... .. 
c 289 
25 
20 
100 
98 
243 
Long Island_ 
Not between 100 per cent dis- 
593 
20 
6 
53 
40 
119 
eased rows. 
Virginia_ __ 
_do. . . 
C 240 
23 
42 
81 
78 
224 
Rural New Yorker: 
N. E. Maine 
Between rows of Green Moun- 
196 
50 
50 
100 
tains with mosaic and spindle 
tuber. 
S. W. Maine-.. 
_do..... 
123 
40 
4 
44 
Long Island_ 
_do. 
341 
46 
li 
50 
107 
Virginia.. 
_do_ . _ 
220 
27 
22 
37 
88 
174 
N. E. Maine_ 
Between rows of Irish Cobblers 
143 
29 
2 
34 
65 
with leaf-roll and spindle tuber. 
S. W. Maine. - 
_do_ 
103 
33 
18 
51 
Long Island_ 
.do. __ 
264 
25 
67 
48 
140 
Virginia.. 
_do_ __ 
c 28 
4 
73 
100 
85 
262 
Long Island_ 
Not between 100 per cent dis- 
237 
46 
36 
24 
106 
eased rows. 
Virginia._. 
_do____ 
68 
19 
13 
20 
36 
88 
Irish Cobbler: 
N. E. Maine_ 
Between rows of Green Moun- 
218 
15 
2 
90 
107 
tains with mosaic and spindle 
tuber. 
S. W. Maine 
_do.... 
77 
14 
4 
38 
56 
Long Island_ 
_do. 
242 
7 
2 
38 
78 
125 
Virginia_ 
_do _ 
631 
12 
12 
16 
92 
132 
N. E. Maine_ 
Between rows of Irish Cobblers 
203 
12 
3 
2 
96 
113 
with leaf-roll and spindle tuber. 
S. W. Maine. . 
_do. 
41 
17 
2 
19 
34 
72 
Long Island_ 
.do_ 
214 
17 
89 
76 
182 
Virginia_ 
-i-.-do. 
c 80 
5 
11 
100 
100 
216 
Long Island_ 
Not between 100 per cent dis- 
192 
20 
1 
17 
74 
112 
eased rows. 
Virginia_ 
_do_ 
621 
11 
22 
15 
72 
120 
Bliss Triumph: 
N. E. Maine . 
Between rows of Green Moun- 
204 
35 
30 
65 
tains with mosaic and spindle 
tuber. 
S. W. Maine . 
_do__ 
6 
33 
16 
49 
Long Island. . _ 
_do___ 
263 
43 
4 
74 
22 
143 
Virginia._ . 
do ... 
C d 212 
24 
45 
93 
68 
230 
N. E. Maine _ 
Between rows of Irish Cobblers 
251 
32 
6 
38 
with leaf-roll and spindle tuber. 
S. W. Maine... 
_do_ 
5 
60 
60 
Long Island_ 
_ .do _ 
255 
29 
4 
93 
8 
134 
Virginia_ 
_do_ __ 
e 205 
31 
33 
100 
32 
196 
Long Island_ 
Not between 100 per cent dis- 
233 
40 
2 
38 
6 
86 
eased rows. 
Virginia_ 
_do_ 
c 148 
32 
22 
84 
18 
156 
Rose Four: 
N. E. Maine. _. 
Between rows of Green Moun- 
158 
22 
5 
(*) 
27 
tains with mosaic and spindle 
tuber. 
S. W. Maine 
.do_ .. 
94 
48 
(«) 
48 
Long Island _ _ _ J 
_do__ 
256 
38 
9 
6 
( e ) 
53 
Virginia_ 
_do . .. 
e 124 
19 
25 
30 
( e ) 
74 
N. E. Maine_ 
Between rows of Irish Cobblers 
112 
54 
1 
22 
(4 
77 
with leaf-roll and spindle tuber. 
S. W. Maine,_. 
_do _ 
50 
52 
6 
(«) 
58 
Long Island_ 
... .do_ _ _ . _ 
262 
38 
10 
51 
(«) 
99 
Virginia. 
.. ..do___ 
d 3 
33 
100 
( e ) 
133 
Long Island_ 
Not between 100 per cent dis- 
283 
58 
1 
7 
100 
166 
eased rows. 
Virginia_ 
_do__ 
« 67 
31 
10 
37 
100 
178 
° Mild mosaic in the Green Mountains and probably in the Bliss Triumphs, and of undetermined type 
in the other varieties. 5 All small except three healthy hills. « All small. 
d Many missing hills. • Not examined because completely diseased in 1922. 
