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<p>Gray stem rot, caused by the fungus <i>Macrophomina phaseolina</i>, poses a serious threat to melon cultivation. We evaluated the biocontrol potential of soil-derived bacterial isolates and commercial microbial formulations against this pathogen, while also assessing their impact on melon plant growth. Initial in vitro screening of 18 bacterial isolates and three commercial formulations (Biotrio, Compost-Aid, and Serenade) identified five promising bacterial candidates. Molecular identification revealed the isolates as <i>Bacillus amyloliquefaciens</i> (LFE24) and four <i>Pseudomonas aeruginosa</i> strains (ATZ11, ATZ13, ATZ15, and ATZ16). Greenhouse trials demonstrated that isolates ATZ11 and LFE24 reduced disease incidence by 40% and 50%, respectively. Notably, the efficacy of the <i>B. amyloliquefaciens</i> isolate LFE24 was comparable to that of established commercial products (<i>p</i> &lt; 0.05). These findings suggest that Compost-Aid, Serenade, and <i>B. amyloliquefaciens</i> are viable candidates for managing gray stem rot in melon production.</p>

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Comparative efficacy of soil-derived bacteria and commercial microbial formulations in controlling melon gray stem rot

  • 期刊论文

  • 发表日期：

    2026年2月24日

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  • Luiz Fernando Bezerra Evangelista,
  • Daniela Almeida de Assunção,
  • Elisandra Alves Bento,
  • Jarlan Lucas dos Santos Silva,
  • Breno de Holanda Almeida,
  • Tatianne Raianne Costa Alves,
  • Ana Paula de Moura,
  • Igor Vinícius Pereira da Silva,
  • Washington Luis da Silva,
  • Márcia Michelle de Queiroz Ambrósio

摘要

Gray stem rot, caused by the fungus Macrophomina phaseolina, poses a serious threat to melon cultivation. We evaluated the biocontrol potential of soil-derived bacterial isolates and commercial microbial formulations against this pathogen, while also assessing their impact on melon plant growth. Initial in vitro screening of 18 bacterial isolates and three commercial formulations (Biotrio, Compost-Aid, and Serenade) identified five promising bacterial candidates. Molecular identification revealed the isolates as Bacillus amyloliquefaciens (LFE24) and four Pseudomonas aeruginosa strains (ATZ11, ATZ13, ATZ15, and ATZ16). Greenhouse trials demonstrated that isolates ATZ11 and LFE24 reduced disease incidence by 40% and 50%, respectively. Notably, the efficacy of the B. amyloliquefaciens isolate LFE24 was comparable to that of established commercial products (p < 0.05). These findings suggest that Compost-Aid, Serenade, and B. amyloliquefaciens are viable candidates for managing gray stem rot in melon production.