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Subject: search.filters.subject.Fusarium oxysporum

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    Biocontrol of Panama disease and postharvest anthracnose on bananas by Neosartorya and Talaromyces fungi
    (2026-01-01)
    Poeaim, Supattra
    ;
    Luong, Thi Thu Huong
    ;
    Pattarasaikul, Wutthipong
    This study aimed to propose a potential antagonist for controlling both Panama disease and postharvest anthracnose in bananas. The findings revealed that Fusarium oxysporum and Colletotrichum musae were the most virulent pathogens causing Panama disease and postharvest anthracnose, respectively. Through dual culture tests, Talaromyces trachyspermus AWP08-01 was identified as a promising biocontrol agent against both F. oxysporum and C. musae, achieving 62.30% spore inhibition and 42.09%, respectively. Moreover, the ethyl acetate extract of T. trachyspermus AWP08-01 showed good antifungal activity. At a 1000-µg/mL concentration, it could inhibit 22.14% and 51.58% spore production of F. oxysporum and C. musae, respectively. By GC-MS analysis, the ethyl acetate extract from T. trachyspermus AWP08-01 was detected containing benzoic acid, hexadecanoic acid, heptadecane and linoleic acid. These findings enhance our understanding of banana disease management and suggest the potential of T. trachyspermus for further development in management both pre-harvest and post-harvest banana diseases.
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    Antifungal activities of Chaetomium spp. Against fusarium wilt of tea
    (2016-01-01)
    Huu Phong, Nguyen
    ;
    Pongnak, Wattanachai
    ;
    Soytong, Kasem
    An isolate of Fusarium denominated as NHP-Fusa-2 from tea wilt and root-rot diseased sample collected in Vietnam was identified as Fusarium oxysporum based on molecular analysis of translation elongation factor-1α sequence. Interestingly, it is the first time F. oxysporum is reported as a causal pathogen of wilt and root-rot disease of tea in Vietnam. Chaetomium spp. were investigated to control F. oxysporum NHP-Fusa-2 in in vitro test. Three antagonists (Ch. cupreum CC3003, Ch. globosum CG05, and Ch. lucknowense CL01) inhibited mycelial growth by 31.69–34.03% and reduced conidial production of the pathogen by 67.25–75.92% in the bi-culture antagonistic test after 30 days with non-significant difference in their effect. All the crude extracts of these antagonists significantly inhibited mycelial growth and conidial production of NHP-Fusa-2. MeOH extract of CC3003 was more effective in conidial inhibition of the pathogen than the others, the effective dose (ED<inf>50</inf>) was 85.30 μg/ml of which, it was hexane (49.32 μg/ml) and EtOAc extract (62.17 μg/ml) in the case of CG05 and CL01, respectively.
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    Antifungal metabolites from antagonistic fungi used to control tomato wilt fungus Fusarium oxysporum f. sp. lycopersici
    (2011-12-28)
    Sibounnavong, P.
    ;
    Charoenporn, C.
    ;
    Kanokmedhakul, S.
    ;
    Soytong, K.
    Chaetomium elatum strain ChE01, Chaetomium lucknowense strain CLT01 and Emericella rugulosa strain ER01, which were isolated from soil in Thailand, effectively controlled the most virulent isolate of Fusarium oxysporum f. sp. lycopersici NKSC02 causing wilt of tomato (Lycopersicon esculentum var Sida). Two antifungal substances were purified: Chaetoglobosin-C from Ch. elatum and Ch. lucknowense and tajixanthone from E. rugulosa. Chaetoglobosin-C showed greater antifungal activity against F. oxysporum f. sp. lycopersici, with an effective dose (ED <inf>50</inf>) of 5.98 μg/ml, compared with tajixanthone (ED <inf>50</inf> of 167 μg/ml). These results suggest that the disease control mechanism of these antagonistic fungi involves antibiosis. The inoculating tomato seedlings var. Sida with conidia of F. oxysporum f.sp. lycopersici, mixed with either a solution of chaetoglobosin-C or tajixanthone showed no wilt symptom. The conidia of F. oxysporum f. sp. lycopersici treated with these two compounds appeared abnormal and lost pathogenicity. © 2011 Academic Journals.