1992 Volume 58 Issue 5 Pages 769-772
Twenty-two isolates of the bottle gourd Fusarium wilt organism (Fusarium oxysporum f. sp. lagenariae) were collected from 22 regions of 8 prefectures in Japan and examined for their pathogenicity to pumpkins and bottle gourds. Some isolates had pathogenicity to Cucurbita ficifolia of a pumpkin plant, but some didn't. They were classified into 4 groups according to the pathogenicity decided on the basis of disease incidence days of the pumpkin; strong, moderate, weak and no pathogenicity. All of them had pathogenicity to bottle gourds, but had no pathogenicity to C. moschata and C. maxima×C. moschata.
