Potential of octanol and octanal from heracleum sosnowskyi fruits for the control of fusarium Oxysporum f. sp. lycopersici

May Khaing Hpoo*, Maryia Mishyna, Valery Prokhorov, Tsutomu Arie, Akihito Takano, Yosei Oikawa, Yoshiharu Fujii*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

Abstract

The antifungal activity of volatile compounds from the fruit, leaf, rhizome and root of 109 plant species was evaluated against Fusarium oxysporum f. sp. lycopersici (FOL) race 1—the tomato wilt pathogen—by using the modified dish pack method. Eighty-eight plant samples inhibited mycelial growth, including volatiles from fruits of Heracleum sosnowskyi, which exhibited the strongest antifungal activity, showing 67% inhibition. Two volatile compounds from the fruits of H. sosnowskyi (octanol and octanal) and trans-2-hexenal as a control were tested for their antifungal activities against FOL race 1 and race 2. In terms of half-maximal effective concentration (EC50) values, octanol was found to be the most inhibitory compound for both pathogenic races, with the smallest EC50 values of 8.1 and 9.3 ng/mL for race 1 and race 2, respectively. In the biofumigation experiment, the lowest disease severity of tomato plants and smallest conidial population of race 1 and race 2 were found in trans-2-hexenal and octanol treated soil, while octanal had an inhibitory effect only on race 2. Therefore, our study demonstrated the effectiveness of volatile octanol and trans-2-hexenal on the control of the mycelial growth of two races of Fusarium oxysporum f. sp. lycopersici and may have potential for the future development of novel biofumigants.

Original languageEnglish
Article number9334
Number of pages17
JournalSustainability (Switzerland)
Volume12
Issue number22
DOIs
Publication statusPublished - 2 Nov 2020

Keywords

  • Antifungal activity
  • Biofumigation
  • Fusarium oxysporum f. sp. lycopersici
  • Heracleum sosnowskyi
  • Octanal
  • Octanol

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