42 E. J. BUTLER. 
The plants were grown in pots; pots, soil and seeds being ster- 
ilised as in Series XIV, and the inoculations were made as in that 
Series. 
Date of sowing and Result 
inoculation. Remarks, 
No. of plants. Treatment. 
Ahout 25 plants in| Inoculated with | Sown and inocula- | Wilt appeared. | The first death 
2 pots. Cephalosporium | ted 18-6-08. was on 24-7-08. 
isolated from the | 
interior of pigeon- 
pea roots com- 
bined with Neo- 
cosmospora from 
the surface of the 
roots. 
(control). to 4-9-08. 
Ditto. Not inoculated | Sown 13-6-08. No deaths up 
} 
The presence of Neocosmospora appeared to make no difference 
in the rapidity of onset or characters of the disease. 
As mentioned on page 53 above, a bacillus was constantly ob- 
tained from the interior of the roots of pigeon-pea plants affected 
by wilt, after flammg. The action of this bacillus on healthy plants, 
both alone and im conjunction with Neocosmospora and the para- 
sitic Cephalosporium, was tested. 
SERIES XIX. 
The culture of the bacillus used was obtamed as described 
under Series XIV above and isolated by plating. That of the Neo- 
cosmospora was the same as in Series IX. That of the parasitic 
Cephalosporium the same as in Series XIV. 
The plants were grown in pots; pots, seeds and soil being steril- 
ised as in Series IX and XIV, and the inoculations made as in 
those Series. 
Date of sowingand Result. Remarks. 
No. of plants. Treatment. TIRE OT EE 
About 25 plants iu | Inoculated with|Sown and inocu-|No deaths up| ..... 
2 pots. bacillus isolated | lated 13-6-08. to 2-9-08, 
from the interior | 
of wilted pigeon- | 
pea roots. 
