Part XVIII .—Biochemical characteristics of species of Penicillium responsible for the rot of Citrus fruits

Decaying oranges or other citrus fruits are almost invariably infected by one of two moulds, viz., P. digitatum Saccardo (= P. olivaceum Wehmer), which causes the olive-coloured rot, and P. italicum Wehmer, which is responsible for the blue-green rot. It has been found in the course of work that each of these species has very definite biochemical characteristics which are described in this paper.