Abstract: Using mainly peach cultivars from northern production area, the species of pathogenic fungi and their ways of post- harvest rot disease infection on peach were studied. The results showed that eight kinds of pathogenic fungi were isolated from peach in storage period. Reinoculation experiment reflected that the pathogenic capability among different fungi showed great diversity in different conditions. Among the pathogens, Botrytis cinerea was the most pathogenic species, and Cladosporium sp. was weak pathogenic; under normal temperature Rhizopus nigricans and Aspergillus sp. were pathogenic and the infectious period was generally very short; Botrytis cinerea and Alternaria sp would infect peach under both low and high temperature.

Key words: peach, pathogen, post-harvest disease, pathogen identification