Abstract
In the present paper the writers dealt with the results of experiments on the inflpence of summer orange oil to the development of the fungi which cause soft rot of oranges during the storege. Four fungi, Aspergillus niger, Rhizopus nigricans, Cephalothecium roseum, and Cochliobolus miyabeanus, the causal fungus of Helminthosporium leaf spot of rice.
A volatile toxic substance which causes the inhibition of the spore, germination and of the mycelial growth of these fungi was found in summer orange oil. It may presumably be n-decylaldehyde which is found in the fraction distilled under 15mmHg at 108°_??_110°C.
