NISHIMURA: A CARRIER OF THE MOSAIC DISEASE 227 
10 showed mosaic on the first new leaves. July 3, plant 1 showed 
mosaic on the first new leaf. These six plants developed the 
disease, but plants 3, 5, 8 and 9 showed no symptoms. 
On July 20, the same experiment was repeated with easter 
series of ten young healthy plants of apple of Sodom 4-5 inches 
high. July 29, plant 12 showed mosaic on the first new leaf. 
July 30, plants 11 and 13 showed mosaic on the first new leaves. 
July 31, plants 14 and 16 showed mosaic on the first new leaves. 
August I, plants 19 and 20 showed mosaic on the second new 
leaves. Plants 15, 17 and 18 showed no symptoms. 
Ten plants were kept in each experiment as controls and after 
twenty-five days they were found to be in healthy condition. 
TABLE III 
SUMMARY OF EXPERIMENT No. 6 
No Date of First symptom pen | 25 days after inoculation 
“| inoculation j Sa days, 5 
1 | June 23. July 3, mosaic on the first new leaf 10 Disease developing 
2 : «| June 30, mosaic on the first new leaf | . - : 
3 oe ee No rea 
4 “| July 1, mosaic on the first new leaf 8 Hissaae a 
5 hr etaly No reaction 
6 ** | June 30, mosaic on the first new leaf +4 Di isease developing 
7 *« | July 2, mosaic on the first new leaf 9 
8 i ee No reaction 
- «« «| July 2, mosaic on the first new leaf 9 Disease developing 
11 | July 20 | July 30, mosaic on the first new le bas) ge 
I July 29, mosaic on first new leaf 9 ue * 
13 «* | July 30, mosaic on the first new leaf 10 i . 
14 «| July 31, mosaic on the first new leaf II - * 
I5 ae es No react 
16 «July 31, mosaic on the first new leaf xi Disease developing 
¥ 7 “sé “ee o No react 
1s ae ae 
19  « | Aug. 1, mosaic on the second new 
lea. 12 Disease developing 
20 « « | Aug. 1, mosaic on the second new 
leaf 12 ae oe 
7. Inoculation of the apple of Sodom with the juice of healthy alke- 
kengi plants 
To prove that the juice of uninoculated plants of P. Alkekengi 
will not produce the disease in the apple of Sodom, twelve healthy 
young plants of apple of Sodom (5-6 inches high) were inoculated 
on September 12 with the juice of the leaves of healthy P. Alke- 
