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Trichoderma asperellum (NST-009): A potential native antagonistic fungus to control Cercospora leaf spot and promote the growth of 'Green Oak' lettuce (Lactuca sativa L.) cultivated in the commercial NFT hydroponic system

Author

Listed:
  • Athakorn Promwee
  • Warin Intana

    (School of Agricultural Technology and Food Industry, Walailak University, Nakhon Si Thammarat, Thailand)

Abstract

Leaf spot caused by Cercospora lactucae-sativae is one of the most damaging diseases of 'Green Oak' lettuce in Thailand. This study was conducted to estimate the effectiveness of Trichoderma asperellum NST-009, a native strain in Thailand, to manage the leaf spot disease and enhance the growth of 'Green Oak' lettuce in a nutrient film technique (NFT) hydroponic system. In vitro tests showed that T. asperellum NST-009 significantly inhibited the mycelial growth of C. lactucae-sativae by 72.50%, and its antifungal metabolite from the culture filtrate of T. asperellum NST-009 inhibited the mycelial growth of C. lactucae-sativae by 93.26%. In the hydroponics experiment, T. asperellum NST-009 reduced the disease severity index by 67.51% compared to the inoculated control and significantly stimulated the growth of the 'Green Oak' lettuce in terms of the plant height (8.62%), canopy width (16.67%), leaf number (18.39%), shoot fresh weight (25.71%), root fresh weight (39.26%), and total P in the leaves (31.45%) compared to the control. In addition, T. asperellum NST-009 was found to survive in both the lettuce leaves and roots at 100.00%.

Suggested Citation

  • Athakorn Promwee & Warin Intana, 2022. "Trichoderma asperellum (NST-009): A potential native antagonistic fungus to control Cercospora leaf spot and promote the growth of 'Green Oak' lettuce (Lactuca sativa L.) cultivated in the commercial ," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 58(2), pages 139-149.
    • Handle: RePEc:caa:jnlpps:v:58:y:2022:i:2:id:69-2021-pps
    DOI: 10.17221/69/2021-PPS
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    References listed on IDEAS

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    1. Titi Thongkamngam & Tanimnun Jaenaksorn, 2017. "Fusarium oxysporum (F221-B) as biocontrol agent against plant pathogenic fungi in vitro and in hydroponics," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 53(2), pages 85-95.
    2. Rozita KABIRI & Fatemeh NASIBI & Hassan FARAHBAKHSH, 2014. "Effect of exogenous salicylic acid on some physiological parameters and alleviation of drought stress in Nigella sativa plant under hydroponic culture," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 50(1), pages 43-51.
    3. Justyna Nawrocka & Magdalena Szczech & Urszula Małolepsza, 2018. "Trichoderma atroviride enhances phenolic synthesis and cucumber protection against Rhizoctonia solani," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 54(1), pages 17-23.
    4. Mohd Zainudin Nur Ain Izzati & Faridah ABDULLAH, 2008. "Disease suppression in Ganoderma-infected oil palm seedlings treated with Trichoderma harzianum," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 44(3), pages 101-107.
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