Abstract
Ipomeamarone, a furanosesquiterpenoid produced in Ceratocystis fimbriata-infected sweet potato root tissue, was decomposed by neither sweet potato strain nor oak strain of C. fimbriata. Ipomeamarone inhibited various physiological events of C. fimbriata such as endo-conidial germination, germ-tube growth, mycelial growth, endoconidial formation, black coloration of mycelia and normal morphological development of mycelia. The inhibitory effects were not so severe in sweet potato strain, pathogenic to sweet potato, compared with oak strain, non-pathogenic one.
