Seleção de bactérias para o controle de Sclerotinia sclerotiorum agente causal do mofo-branco em feijão

Autores

DOI:

https://doi.org/10.1590/1983-21252026v3914314rc

Palavras-chave:

Antagonismo. Bacillus. Metabólitos. Paenibacillus. Fitopatógeno.

Resumo

Sclerotinia sclerotiorum, fungo causador do mofo-branco, é um importante fitopatógeno de difícil controle em muitas culturas de valor comercial. É necessária a busca por ferramentas sustentáveis para o manejo desse patógeno com objetivo de atingir a sustentabilidade no campo. Assim, o objetivo da pesquisa foi prospectar bactérias para o biocontrole da doença. Foi utilizado um isolado de S. sclerotiorum (VPB015) como fitopatógeno. Portanto, foram utilizadas 26 cepas bacterianas obtidas de diferentes coleções, e 23 apresentaram ação antagonista contra fungo. Destas, seis produziram metabólitos termoestáveis com ação inibitória ao patógeno. Não foi constatada a produção de compostos voláteis pelas bactérias. O isolado GN01, identificado como B. velezensis diminuiu a incidência da doença em plântulas de feijão em solo infestado com S. sclerotiorum. Cinco cepas diminuíram a severidade da doença em folhas destacadas. O B. velezensis GN01 apresentou potencial no controle da doença pelo tratamento de semente de feijoeiro.

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Publicado

15-07-2026

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Artigo Científico