Abstract
1. Important peach varieties are inoculated with the fungus Gloeosporium laeticolor Berk.
2. No variety proved immune, as far as the experiment is concerned.
3. Peach varieties showed various degrees of susceptibility.
4. Two varieties, Tachibanawase and Jitsugetsutô proved resistance and have good qualities and early ripening character.
5. Most species belonging to Chinese race are resistant, while those belonging to Persian race are generally susceptible.
6. There seems to be no biologic form among the strains of Gloeosporium laetecolor Berk.
7. Adaptations of fungi can not be accepted in this experiment.
