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Potential of Nonthermal Atmospheric-Pressure Dielectric Barrier Discharge Plasma for Inhibition of Athelia rolfsii Causing Southern Blight Disease in Lettuce

Author

Listed:
  • Salit Supakitthanakorn

    (Department of Plant Pathology, Faculty of Agriculture at Kamphaeng Sean Campus, Kasetsart University, Nakhon Pathom 73140, Thailand)

  • On-Uma Ruangwong

    (Division of Plant Pathology, Department of Entomology and Plant Pathology, Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand)

  • Choncharoen Sawangrat

    (Department of Industrial Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai 50200, Thailand
    Agriculture and Bio Plasma Technology Center (ABPlas), Science and Technology Park, Chiang Mai University, Chiang Mai 50100, Thailand)

  • Wimada Srisuwan

    (Agriculture and Bio Plasma Technology Center (ABPlas), Science and Technology Park, Chiang Mai University, Chiang Mai 50100, Thailand)

  • Dheerawan Boonyawan

    (Plasma and Beam Physics Research Facility, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand)

Abstract

Athelia rolfsii is one of the most destructive and aggressive fungal pathogens worldwide and causes southern blight disease of lettuce. A nonthermal atmospheric-pressure dielectric barrier discharge (DBD) plasma has attracted interest as an alternative control method to chemical usage because of its antimicrobial activity. Exposure of A. rolfsii to DBD plasma for 5, 10, 15, and 20 min resulted in in vitro fungal inhibition of mycelial discs and sclerotia. The results showed that DBD plasma exposure for 10 min completely inhibited fungal growth of mycelial discs, whereas exposure for over 20 min was required to inhibit the hyphal growth of sclerotia. Scanning electron microscopy (SEM) observations of mycelia and sclerotia abnormalities revealed laceration and damage of both mycelia and sclerotia. In addition, disease incidence and severity were reduced in mycelial and sclerotia inoculation following DBD plasma exposure for 15 and 20 min, respectively, compared with the positive control. In conclusion, the DBD plasma demonstrates antifungal activity against A. rolfsii via inhibition of fungal growth and reduction in disease incidence and severity. Therefore, DBD plasma has the potential to be applied in controlling southern blight disease of lettuce.

Suggested Citation

  • Salit Supakitthanakorn & On-Uma Ruangwong & Choncharoen Sawangrat & Wimada Srisuwan & Dheerawan Boonyawan, 2023. "Potential of Nonthermal Atmospheric-Pressure Dielectric Barrier Discharge Plasma for Inhibition of Athelia rolfsii Causing Southern Blight Disease in Lettuce," Agriculture, MDPI, vol. 13(1), pages 1-14, January.
    • Handle: RePEc:gam:jagris:v:13:y:2023:i:1:p:167-:d:1030224
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    Cited by:

    1. Linjie Hao & Yong You & Yunting Hui & Decheng Wang & Changyong Shao, 2024. "Structure Optimization of Gliding Arc Electrodes for Seed Treatment Based on the Study of Plasma Distribution Characteristics," Agriculture, MDPI, vol. 14(8), pages 1-15, August.

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