Controle biológico de Meloidogyne incognita (Kofoid & White) Chitwood, mediante a aplicação de agentes de controle biológico
Resumo
O objetivo da pesquisa foi determinar o potencial de cepas de Trichoderma spp., Isaria fumosorosea e Isaria javanica como agentes de biocontrole sobre Meloidogyne incognita (Kofoid e White) Chitwood, proveniente de tomate cv. Saladette (Solanum lycopersicum L.). Foram utilizadas cepas de T. harzianum, T. viride, T. koningii, T. asperellum e um isolado de Trichoderma sp., I. fumosorosea e I. javanica, previamente selecionadas por sua alta capacidade parasítica, antibiose e adaptação a diversas condições ambientais e substratos. Nos ensaios in vitro, foi avaliado o parasitismo dos agentes de controle biológico (um filtrado puro de cada uma das cepas) sobre ovos, massas de ovos e juvenis (J2) de M. incognita. As avaliações foram realizadas com microscópio óptico com objetiva de 40X, aos 10 dias e 72 horas, respectivamente. O controle do nematoide em condições semicontruladas foi realizado na área experimental utilizando sacos de polietileno com capacidade de 10 kg, inoculados com aproximadamente 5.000 juvenis (J2) e transplantados com mudas de tomate. Sete dias após a inoculação do nematoide, os agentes biológicos foram aplicados ao solo; 45 dias depois foram avaliadas as variáveis de incidência e severidade. Com base nos resultados obtidos, verificou-se que as cepas de T. harzianum, T. asperellum, T. koningii e I. fumosorosea foram eficientes no controle de M. incognita em diferentes estágios do seu ciclo biológico.
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Direitos de Autor (c) 2026 Jesús Orlando Pérez-González, Humberto Rafael Bravo-Delgado, Yonger Tamayo Aguilar, Adolfo Amador Mendoza, Jorge Francisco León de la Rocha

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