402 Howard. — On some Diseases of the 
during the first month, at the end of which the experiment 
had to be discontinued. No infection was noted in the 
controls. In one case where pieces of leaf-sheath were used, 
one of the shoots became badly infected with the sclerotia 
fungus of Went’s ‘red-rot’ disease. Fourteen days after in- 
fection the shoot was killed by the fungus and covered with 
white thread-like strands and sclerotia. The leaf-sheath 
employed had evidently been attacked by this fungus. 
Experiment 4. A small field experiment was next carried 
out. During planting-time in the early part of December, 
1901, the nodes and cut ends of ten healthy White Trans- 
parent cuttings were covered with actively growing mycelium, 
obtained originally from a toadstool spore, and planted in the 
ordinary way. Eight of these developed normally, but the 
other two were destroyed by the fungus Thielaviopsis etha - 
ceticus , Went, the shoots dying off shortly after they appeared 
above ground. At the present time (August 30, 1902) the 
shoots from these canes are healthy and vigorous and show 
no trace of root disease, although white mycelium, char- 
acterized by clamp-connexions, can be seen as a matted 
white coating on the scale-leaves of the buds on the below- 
ground portions of these canes. 
In the early part of February, 1902, ten similarly infected 
cuttings were planted in the same field, and were watered just 
sufficiently for germination to take place. After the shoots 
appeared above ground, the soil around the cuttings was 
consolidated by treading so as to render root development 
as difficult as possible. Little growth was made during the 
dry months of March and April, during which time five of 
the cuttings died. On examination they and their shoots 
were found to be penetrated by the fungus in all directions. 
The remainder showed no response to the rains of May and 
June, and when examined on August 20 were found to be 
throwing up shoots from below, and to exhibit all the char- 
acteristics of canes attacked by the root disease under con- 
sideration. They possessed few roots, the majority having 
been destroyed, during early development, by the fungus. The 
