252 
Journal of Agricultural Research 
Vol. XXIV. Ko. 3 
Hi —Composite record cf the tests of the insect transmission of the grass mosaic — 
Continued 
Species. 
Num¬ 
ber of 
plants. 
Date exposed. 
Character. 
Oryza saliva var. 
50 
May 20, 1920 
Virulent.... 
C. I. No. 1962. 
Do... 
so 
.do. 
Nonvirulent 
Eleusine coracana 
SO 
.do... 
Virulent.... 
var. S. P. I. No. 
431^. 
Do....... 
50 
. ..do. 
N on virulent 
Agrostis palustris. .. 
40 
May IS; 1920 
Virulent.... 
Do..... ....... 
40 
Hft . . 
N on virulent 
Poa ptatensis. ...... 
40 
.do. 
Yiruimt.... 
Do. 
40 
..., do_ , 
N onvirulent 
Holcus halepenses. . 
40 
.do.. 
Virulent.... 
Do... 
40 
... do._,.. 
N onvirulent 
PJUeum praiense. ... 
40 
Virulent.... 
Do.. 
40 
.do. 
Nonvirulent 
Coix tachryma-jobi .. 
6 
.... .do. 
Virulent. ... 
Do.... 
6 
.. ..do . 
N onvirulent 
Miscantkus sinensis 
z6 
May 30 , z9ao 
Virulent .... 
Do.... 
6 
do 
N onvirulent 
Permisetum pur Pi*- 
4 
May 30,1920 
Virulent. ... 
reum. 
Do. 
4 
.... do _ . 
Nonvirulent 
Merker grass. 
4 
. do . 
Virulent .... 
Do .. 
4 
. do, _ 
Nonvirulent 
Australian giant 
4 
.... .do. 
Virulent .... 
grass. 
Do..... .. 
4 
..... do . 
Nonvirulent 
Syntherisvta sangui- 
10 
June z, X930 
Virulent .... 
nalis. 
Do. .. 
xo 
. .do. . . 
Nonvirulent. 
Zea maysvsLT. U. S. 
SO 
.do. 
Virulent .... 
Selection No. 183. 
Do . 
50 
. do. .. ... 
Nonvirulent 
Paspglum boscia- 
3 
July 31, X920 
Virulent .... 
num. 
Do . 
3 
do 
Nonvirulent 
Saccharum ojfficma- 
10 
Aug. 3,1920 
Virulent .... 
rum var. Ixntis- 
iana Purple. 
Do . 
zo 
_ do - ,., - 
Nonvirulent 
Zea mays . 
zo 
.do . ..... 
Virulent . . 
Do. . . . . . 
zo 
do 
N onvirulent 
Holcus sorghum .... 
S 
. do . . 
Virulent .... 
Do . 
. S 
. do . 
Nonvirulent. 
Coix lachryma-jobi .. 
S 
. do . 
Virulent .... 
Do:.. . 
5 
. do . 
Nonvirulent 
Syntherisma sangui- 
5 
. do . 
Virulent .... 
nalis. 
Do . 
5 
. do. . . 
Nonvirulent. 
Miscanthus sinensis. 
3 
.do . 
Virulent .... 
Do . 
3 
.do . 
Nonvirulent 
Saccharum ojfficina- 
10 
Virulent .... 
rum vat. Louis¬ 
iana Puiple. 
Do...... . 
zo 
,.. .do. ___ 
Nonvirulent 
Zea mays. ... 
zo 
.do . 
Virulent _ 
Do . 
xo 
. do, . 
N onvirulent 
Holcus sorghum .... 
5 
. do . 
Virulent .... 
Do..., . 
5 
do 
Nonvirulent 
Coix lachrymorjdbi, . 
5 
..!..do‘. 
Virulent .... 
Do . 
5 
. do- 
N onvirulent 
Syntherisma sangui- 
5 
. do . 
Virulent .... 
nalis. 
Do . 
5 
.do, 
Nonvirulent 
Miscanthus sinensis. 
a 
. do. .. 
Virulent .... 
Do... . 
3 
. do . 
Nonvirulent 
Saccharum officina- 
zo 
Virulent .... 
rum var. Louis¬ 
iana Purple. 
Do.. 7 .. 
xo 
. do, .,_ 
Nonvirulent 
Zea mays . 
zo 
. do . 
Virulent .... 
Do ...*.... 
zo 
. do. ,. 
Nonvirulent 
Holcus sorghum, . . . 
5 
.do. 
Virulent. ... 
Do . 
5 
. do . 
Nonvirulent 
Coix lachryma-jobi. . 
5 
. do . 
Virulent .... 
Do . 
5 
Nonvirulent. 
Results. 
Insect. 
Aphis maidis. 
.do. 
.do. 
•do. 
.do. 
.do. 
•do. 
.do. 
.do. 
.do. 
.do. 
•do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.....db. .. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do.. 
.do. 
.do. 
.do. 
.do. 
.do.. 
.do. 
.do. 
.do. 
.do. 
.do. 
KoUa similis .. 
Condition. 
All healthy. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
All mottled; 
not clear case 
of mosaic. 
All healthy. 
5 mosaic. 
All healthy. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
6 mosaic. 
All healthy. 
3 mosaic. 
All healthy. 
3 mosaic. 
All healthy. 
3 mosaic. 
All healthy. 
3 mosaic. 
All healthy. 
5 mosaic. 
All healthy. 
Do. 
Db. 
5 mosaic. 
All healthy. 
a mosaic. 
All healthy. 
Do. 
Date 
examined. 
Aug. X, 1930 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
.do. 
June rs, 1920 
.do........ 
July IS, 1930 
.do... 
Jime 30,1920 
.do. 
.do. 
.do... 
July 6 ,1920 
.do. 
July 2$, 1920 
.do. 
July 28,1930 
.do. 
Aug. 31, Z920 
.do. 
Aug. 38» 1930 
Sept. IS, 1930 
Aug. 38,1920 
Sept. IS, 1920 
Aug. 28,1930 
Sept. IS, 1920 
.do. 
.do. 
Aug. 38,1930 
Sept. IS, 1920 
Oct. 3,1920 
.do. 
Sept. IS, 1920 
do. 
do. 
do. 
do. 
do. 
do. 
do. 
do. 
Sept. 9,1920 
.do. 
.do. 
.do. ;. 
, ....do. 
.....do. 
.do. 
.do. 
.do. 
.do. 
__do. 
Draeculaceph- 
ala molipes. 
do 
do 
do 
do 
do, 
do, 
.do. 
.do 
,do. 
.do 
.do 
....do. 
... .do. 
_do. 
Sept. IS, X920 
_do. 
_do. 
....do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
Do. 
