Vol 117 (2004): Proceedings of the Florida State Horticultural Society
Handling & Processing

In vitro evaluation of selected essential oils as fungicides against Penicillium digitatum sacc.

David J. Hall
Fresh Mark Corporation
Published December 1, 2004
  • penicillium digitatum,
  • mint oil,
  • citrus oil,
  • cinnamon oil,
  • clove oil,
  • rosemary oil,
  • geranium oil,
  • wintergreen oil,
  • cumin oil
  • ...More


Several essential oils were evaluated for their efficacy as potential fungicides against Penicillium digitatum. Potato dextrose agar plates were streaked with a suspension of the spores of P. digitatum, then 10 µL of various essential oils were placed into a well in the center. After a period of growth the zone of inhibition was measured. Oils of cinnamon leaf, clove leaf, cumin and spearmint displayed larger than average zones of inhibition while the oils of Citrus sp. And wintergreen displayed minimal inhibition. While most plates displayed strong mycelial growth and sporulation outside the zone of inhibition, on the plates treated with cumin and wintergreen mycelial growth was weak and no spores developed.