July 29, 1918 
215 
Potato-Stem Lesions 
Table I. —Results of the potato-stem inoculations with Rhizoctonia solani t Fusarium 
spp., and several other fungi —Continued 
Name of culture. 
R. solanit Hyp. I (from 
potato). 
R. solanit R. V (from 
beet seedlings). 
R . solanit R. VI (from 
beet seedlings). 
R. solanit R.' VII (from 
beets). 
R. solanit R. XI (from 
potato), 
R . solanit R. XII (from 
beets). 
R. sp., R. XIII (from 
onion). 
R. solanit R. XIV (from 
radish). 
R. solanit R. XV (from 
pine seedlings). 
R. solanit R. XVI (from 
beets). 
R. solanit R. XVII (from 
peanut). 
R. solanit R. XVIII 
(from potato). 
R . solanit R. XX (from 
potato). 
R. solanit R. XXIII 
(from alfalfa). * 
R. solanit R. XXIV 
(from potato). 
R. solaniy R. XXV 
(from carnation). 
R. solanit R. XXVI (re¬ 
ceived from Amster¬ 
dam) . 
R. solanit R. XXVII 
(from potato.) 
R. solanit R. XXIX 
(from potato). 
R . solanit R. XXX (from 
potato). 
R . solanit R. 724 F (from 
pine). 
R. solani, R. 147 W (from 
spruce). 
R . solanit R. 187 X (from 
potato). 
Date of isolation. 
Num¬ 
ber of 
plants 
inocu¬ 
lated. 
Num¬ 
ber of 
plants 
in¬ 
fected. 
October, 1914.. 
8 
5 
September, 
5 
0 
1911. 
.do. 
8 
8 
October, 19 n.. 
6 
6 
October, 1912.. 
8 
8 
September, 
8 
6 
1912. 
May, 1911. 
3 
0 
February, 
3 
0 
1913* 
June, 1911. 
6 
6 
1912. 
5 
2 
i 9*4 . 
5 
3 
October, 1914.. 
3 
3 
19*4 . 
3 
0 
Sep tember, 
3 
3 
I 9 I 4 * 
June,1915. 
3 
1 
September, 
5 
2 
1916. 
3 
2 
1916.. 
3 
0 
July, 1916. 
4 
2 
July, 1916. 
4 
3 
1916. 
3 
3 
1910. 
1910. 
♦ 
3 
3 : 
3 
3 
Character of injury produced. 
A number of medium-sized 
deep and very dark can¬ 
kers on stems. 
Targe, deep, irregular, me¬ 
dium-dark necrotic areas 
on stems. 
Numerous small dark-brown 
spots on stems; brown dis¬ 
coloration on roots pres¬ 
ent. 
Dark - brown cankers on 
stems and stolons. 
Small, light-brown spots on 
stems. 
Small lesions on stems and 
some on stolons. 
Small brown spots on stems. 
Do. 
Do. 
Small dark-brown spots on 
stems; younger shoots and 
some of the roots killed. 
Targe necrotic area on one 
stem. 
Brown spots on stems. 
Targe irregular lesions on 
stems; some infection on 
stolons present. 
Brown lesions on stems. 
Deep cankers on stems. 
Pronounced depressed 
brown lesions; especially 
severe on stem inoculated 
with rice culture. 
Distinct but small and shal¬ 
low spots on stems; more 
at the crown. 
Only slight browning on 
stems. 
