Acg. Fiori et al., Antifungal activity of leaf extracts and essential oils of some medicinal plants against Didymella bryoniae, J PHYTOPATH, 148(7-8), 2000, pp. 483-487
Citations number
13
Categorie Soggetti
Plant Sciences
Journal title
JOURNAL OF PHYTOPATHOLOGY-PHYTOPATHOLOGISCHE ZEITSCHRIFT
The fungitoxicity of crude extracts and essential oils of Achillea millefol
ium, Cymbopogon citratus, Eucalyptus citriodora and Ageratum conyzoides on
the fungus Didymella bryoniae was verified in vitro by means of germination
of spores and mycelial growth. In addition, some observations were made us
ing scanning electron microscopy (SEM) to detect possible alterations on th
e hyphae of Didymella bryoniae. The results revealed that crude extracts of
E. citriodora and A. conyzoides were more effective in inhibiting the myce
lial growth of D. bryoniae whereas in the germination of spores A. conyzoid
es and A. millefolium were responsible for most of the inhibition, namely,
52 and 46%, respectively. The essential oils of C. citratus, A. conyzoides
and E. citriodora provided 100% inhibition of the mycelial growth and germi
nation of spores of D. bryoniae. SEM observations revealed alterations in t
he growth pattern of hyphae of D. bryoniae when the essential oil of A. mil
lefolium was present.