46 
Journal of Agricultural Research 
Vol. XXXI, No. 1 
Table XVII. — Results of inoculations of healthy plants of Martynia louisiana 
with cucurbit mosaic 
Date of 
inoculation 
Sept. 2,1919... 
Do_ 
Apr. 10,1920- 
Do_ 
Apr. 15, 1920... 
Do_ 
Apr. 28, 1920.._ 
Do.. 
July 8, 1920.... 
Do_ 
July 22,1920... 
Do. 
Aug. 8, 1920_ 
Do_ 
Aug. 12,1920... 
Do.. 
Method of inoculation 
Location of 
plants 
Number 
of plants 
inocu¬ 
lated 
Number 
of plants 
mosaic 
Date 
observed 
Aphids from mosaic martynia_ 
Aphids from healthy martynia (con¬ 
trol). 
Aphids from mosaic martynia_ 
Aphids from healthy martynia (con¬ 
trol) . 
Artificial_____ 
Control_____ 
Aphids from mosaic martynia... 
Aphids from healthy martynia (con¬ 
trol). 
Artificial___ 
Control_ 
Aphids from mosaic martynia.. 
Aphids from healthy martynia (con¬ 
trol) . 
Aphids from mosaic martynia.. 
Aphids from healthy martynia (con¬ 
trol). 
Artificial---- 
Control....... 
Greenhouse. 
_do_ 
.do.. 
_do_ 
_do_ 
_do_ 
_do_ 
_do_ 
Field... 
_do_ 
.do_ 
_do- 
_do_ 
_do- 
Greenhouse. 
_do. 
9 
8 
5 
5 
6 
6 
3 
3 
8 
8 
6 
*6 
4 
4 
8 
8 
6 
0 
3 
0 
4 
0 
3 
0 
5 
0 
2 
0 
4 
0 
6 
0 
Sept. 12,1919 
Sept. 20,1919 
Apr. 30,1920 
Do. 
Apr. 24,1920 
Do. 
May 10,1920 
Do. 
July 21,1920 
Do. 
Aug. 3,1920 
Do. 
Aug. 24,1920 
Do. 
Do. 
Do. 
Table XVIII. — Results of inoculation of healthy cucumber plants from mosaic 
plants of Martynia louisiana 
Date of 
noculation 
Method of inoculation 
Location 
of plants 
Number 
of cu¬ 
cumber 
plants in¬ 
oculated 
Number 
of plants 
mosaic 
Date 
observed 
July 23,1919- 
Aphids from mosaic martynia... 
Greenhouse. 
12 
12 
Aug. 4,1919 
Do_ 
Aphids from healthy martynia (con- 
_do_ 
12 
0 
Do. 
Sent 3 1919 
not ). 
Artificial _ . _ 
_do_ 
8 
6 
Sept. 14,1919 
Dn 
Control _ __ _ 
_do_ 
8 
0 
Do. 
Do 
Artificial_ 
Field.. 
10 
8 
Do. 
Do 
Control _ __ 
_do. 
8 
0 
Do. 
July 52, 1920— 
Aphids from mosaic martynia.. 
Greenhouse. 
8 
5 
July 31,1920 
Do. 
Aphids from healthy martynia (con- 
_do_ 
8 
- 0 
Do. 
Tulv 29 1920 
trol) - 
Artificial __ 
_do_ 
6 
3 
Aug. 7,1920 
J Ulj 4uUf IUaV/... 
Do 
Control_ 
_do_ 
6 
0 
Do. 
Do 
Artificial _ _ 
Field. 
10 
5 
Do. 
Do 
Control _ _ 
_do_ 
10 
0 
Do. 
Aug. 2,1920- 
Artificial......- 
Greenhouse. 
6 
5 
Aug. 13,1920 
Do 
Control _ _ 
.do_ 
6 
0 
Do. 
Aug. 10,1920- 
Aphids from mosaic martynia. 
_do_ 
4 
3 
Aug. 18,1920 
Do. 
Aphids from healthy martynia (con¬ 
.do. 
4 
0 
Do. 
Oof 10 1920 
trol). 
Artificial ___ 
_do_ 
6 
4 
Oct. 27,1920 
\/Lv» lUy A - - — 
Do 
Control __ _ _ 
_do_ 
6 
0 
Do. 
Aue 10 1922 
Artificial . _ 
Field_ 
5 
3 
Aug. 18,1922 
Dft 
Control _ _ _ 
_do_ 
5 
0 
Do. 
Aiiff 11 1922 
Artificial . _ 
.do_ 
6 
4 
Aug. 22,1922 
AUg* IX) id*'*' - - - 
Do 
Control_ 
4 
0 
Do. 
SYMPTOMS OF CUCURBIT MOSAIC ON THE MARTYNIA 
The symptoms of the disease on martynia are very similar to those 
on the cucurbits. Mosaic martynia plants develop a curling and 
mottling of the younger leaves which is much like that which occurs 
on the cucumber, with the exception that the green areas are very 
large and few in number, the yellowed portion including the greater 
part of the leaf. It has also been noted that a single branch of a 
mosaic martynia plant will show striking symptoms of mosaic, while 
