Controle biológico da podridão cinzenta da videira: avaliação in vitro e in vivo da atividade antagônica de cepas indígenas de Trichoderma harzianum (Mascara, Argélia)
Resumo
O mofo cinzento, causado pelo fungo necrotrófico Botrytis cinerea, foi responsável por perdas econômicas significativas na produção de videira (Vitis vinifera L.) em todo o mundo, incluindo a Argélia, o que destacou a necessidade de alternativas de controle sustentáveis. O objetivo deste estudo foi avaliar o potencial antagônico de uma cepa indígena de Trichoderma harzianum contra isolados locais de B. cinerea de Mascara, Argélia. Um isolado altamente virulento de B. cinerea (BC3) foi coletado de folhas de videira infectadas e identificado por meio de análises morfológicas e moleculares, enquanto o isolado antagonista de T. harzianum (T5) foi obtido da rizosfera de videiras saudáveis. Ensaios de dupla cultura in vitro mostraram que T. harzianum inibiu significativamente o crescimento micelial de B. cinerea, com inibição direta de 80,50 % e inibição indireta de 72,87 %. Experimentos in vivo confirmaram ainda mais sua eficácia, reduzindo a incidência da doença em 56,25 % e acelerando o crescimento das plantas, aumentando a altura de 60 para 96 cm, com notável melhora na biomassa vegetativa. Esses resultados sugerem que a cepa nativa T. harzianum T5 é um agente de biocontrole promissor e eficaz para o manejo sustentável do mofo cinzento em vinhedos.
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Direitos de Autor (c) 2025 Imen Benbahi, Aoumria Merzoug, Mohamed El Amine Kouadri, Amel Bennacer

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