a parasitic Fungus on Sugar-Cane and Cacao. 697 
invading mycelium could be distinguished both in the wood 
and bast as far as six inches from the point of infection. 
Cultivations made by infecting sterile tubes of food- 
material with small portions of tissue taken from the bast 
at this distance from the wound, developed the characteristic 
pycnidia and spores of the Fungus. The control experiment 
showed no infection. 
( b ) Three green pods were selected for this experiment. 
In a cavity of two of these, mycelium of the Fungus, seven 
days old, was introduced, while the third was used as a control. 
In three days the inoculated pods showed that the mycelium 
had spread through about a quarter of the pod, and cultures 
of a portion of the diseased tissue, taken as far as possible 
from the point of infection, developed the characteristic organs 
of fructification of the Fungus. No infection was detected in 
the control pod. 
Infection of the Sugar-Cane with the Cacao Fungus. 
Three healthy B 347 canes were selected. In two of them 
pure culture-mycelium was introduced into a small cavity 
made under the rind, and the third served as a control. In 
eighteen days the mycelium had spread into the tissues of the 
internodes above and below that in which the infecting cham- 
bers were cut, and the characteristic pycnidia of the Fungus 
were formed in large numbers under the rind in the internode 
in which infection was made. No infection was detected in 
the control cane. 
These cross-infection experiments leave no doubt that the 
two Fungi are identical, and that the Fungus has not yet 
adapted itself to its host closely enough to give rise to two 
physiological species. 
Prophylaxis. 
In dealing with the remedial measures which might be 
adopted on estates to check the ravages of this Fungus, it 
is well to remember that it readily lives as a saprophyte on 
old cacao-pod husks, and on the dead wood which is usually 
