THE MOSAIC DISEASE OF CUCURBITS. 7 
Jagger (20), however, states that the white-pickle type of mosaic 
disease, which is the one studied by the writer, has been transmitted 
to one of the Lobeliacese (Lobelia erinus L. var. gracilis) and to one 
of the Composite (Helianthus debilis Nutt.). It is thus evident that 
in some cases the disease may pass from the cucumber to hosts out- 
side the Cucurbitacese. 
Table II. — Record of inoculations of cucumber plants with infectious mosaic diseases 
of noncucurbitaceous plants and iviih suspected mosaic plants of other families. 
Plants Having Mosaic Diseases Known to be Infectious Used as Source of Inoculum. 
Plant used as source of 
inoculum. 
Preparation of inoculum. 
Number 
of plants 
inocu- 
lated. 
Results. 
Date inocu- 
lated. 
Number 
of mosaic 
plants. 
Datelast 
observed. 
Aug. 25,1915 
Sept. 3,1915 
Dec. 21,1915 
Expressed juices 
5 
9 
5 
8 
6 
8 
8 
12 
15 
24 
5 
6 
6 
18 
20 
35 
25 
9 
10 
5 
4 
18 
9 
10 
8 
9 
10 
6 
4 
5 
8 
3 
17 
5 
17 
8 




































Sept. 10, 1915 
Sept. 20, 1915 
Jan. 22,1916 
.do . 
do 
.do 
do 
Feb. 4,1916 
Aug. 19,1916 
do 
do 
do 
Crushed leaf tissues 
Feb. 27,1916 
Sept. 5,1916 
Sept. 23, 1916 
Mar. 3, 1917 
Mar. 21,1917 
Sept. 7,1916 
Feb. 18,1917 
Feb. 20,1917 
do 
do 
do 
Crushed leaf tissues 
Expressed juices 
Dec. 2, 1917 
.do 
do 
Jan. 16,1918 
Mar. 1, 1918 
Feb. 15,1918 
.do 
Crushed lea f tissues 
Dec. 21,1915 
Mosaic tobacco 
do 
Jan. 22,1916 
Sept. 23, 1916 
Mar. 18,1917 
Apr. 20,1917 
June 14,1917 
Aug. 29,1916 
do 
Feb. 17,1917 
Mar. 30,1917 
Mav 20,1917 
do 
do 
do 
do 
do 
do 
Nov. 10,1917 
Jan. 11,1918 
do 
....do 
Crushed leaf tissues 
Dec. 1, 1917 
Jan. 30, 1918 
Sept. 3.1915 
Sept. 10,1915 
do 
Sept. 20, 1915 
Do. 
do 
do 
Julv IS, 1916 
do 
do 
Aug. 17,1916 
Sept. 23,1916 
Mar. 23,1918 
Aug. 30,1916 
Mar. 5, 1918 
do 
do.. 
do.. 
Mosaic potato 
do 
do.. 
Sept. 3.1915 
Sept. 10; 1915 
Aug. 23,1916 
Sept. 3,1915 
Sept. 10,1915 
Aug. 23,1916 
do 
do... 
Sept. 20, 1915 
Sept. 23, 1916 
Do. 
do 
Mosaic pokeweed (Phyto- 
lacca aecandra). 
do 
do 
do 
do 
Sept. 20, 1915 
Do. 
do 
do 
Sept. 15, 1916 
Sept. 23, 1916 
Apr. 1, 1916 
Apr. 22,1916 
Sept. 20, 1915 
Do. 
Aug. 30,1916 
Mar. 19,1916 
do 
Crushed leaf tissues 
Apr. 1,1916 
Sept. 3,1915 
Sept. 10, 1915 
Julv 20,1916 
Sept. 10, 1915 
Aug. 30,1916 
...do 
.do 
Peach with yellows (leaves 
and twigs). 
do 
do 
.do 
do 
Little peach leaves and 
twigs. 
do 
do * 
Aug. 17,1916 
Sept. 20, 1915 
Sept. 23, 1916 
do 
Plants Having Diseases of the Mosaic Type of Suspected Infectious Nature Used as Source 
of Inoculum. 
Sept. 10, 1915 
July 20,1915 
Aug. 25,1916 
Sept. 10, 1916 
Julv 20,1916 
Sept. 7,1916 
Aug. 10,1917 
Sept. 8,1916 
Aug. 18,1917 
Aug. 30,1917 
Aug. 30, 1916 
Mosaic milkweed( A sclepias 
syriaca). 
do 
do 
Mosaic red clover ( Trifo- 
lium pratense). 
do 
Mosaic martynia (Martynia 
louisiana) 
do 
Mosaic pepper ( Capsicum 
annuum). 
Mosaic ragweed (Ambrosia 
trifida). 
do 
Mosaic sumac (Rhus ty- 
pMna). 
Expressed juices . 
.do. 
.do. 
Crushed leaf tissues . 
Expressed juices 
.do. 
Crushed leaf tissues . 
Expressed juices 
9 

5 
7 
10 



5 
8 


6 
3 


7 

8 
8 


Sept. 20, 1915 
Aug. 
Sept. 
Sept. 
Aug. 
Sept. 
Sept. 
Sept. 
17,1916 
23, 1916 
20, 1916 
17, 1916 
23, 1916 
5, 1917 
23,1917 
Sept. 12, 1917 
Sept. 
Sept. 
24,1917 
23, 1916 
