PLATE 7 
A. —Growth of coconut strains on potato dextrose agar made in Altman incubators 
at various temperatures. The effect of light and darkness is clearly shown in the two 
plates grown at the same temperature: 22.0 in the dark; 22.0L, in the light. A fluffy, 
granular growth due to sporulation is produced in the light. 
B. —Growth on potato dextrose agar at room temperature of the Phytophthora strain 
from coconut under various hydrogen-ion concentrations. 
{ C.—Growth on potato dextrose agar at room temperature of the Phytophthora 
strain from cacao under various hydrogen-ion concentrations. 
