Atividade de Pochonia chlamydosporia sobre nematoides do gênero Meloidogyne na presença de matéria orgânica

• Autor(a) principal: Figueiredo, Leonardo Domingues de
• Data de Publicação: 2014
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/4437
• topic: Nematóide; Pochonia chlamydosporia; Fungos nematófagos - Controle biológico; Nematode; Pochonia chlamydosporia; Fungi nematophagous - Biological control; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOSSANIDADE::FITOPATOLOGIA

Nematodes of the genus Meloidogyne have been consistently related to production losses in several crops in Brazil. In addition, the society and producers have increasingly demanded more sustainable control measures to these pathogens. Thus, this Work aimed to study the parasitic activity of the biological control agent Pochonia chlamydosporia (Pc-10) in the presence of organic materials in two pathosystems: Meloidogyne javanica in tomatoes plants (Solanum lycorpsicum) and Meloidogyne enterolobii in barbados cherry plants (Malpighia glabra). Two experiments Were performed to evaluate if the application of organic materials with different levels of carbon and nitrogen ratios (C:N) Would modify beneficially the soil environment to improve P. chlamydosporia activity against nematodes eggs of the genus Meloidogyne. In this experiment was concluded that high levels of nitrogen in the organic material improved fungus control performance against M. javanica. Such knowledge can improve the P. chlamydosporia utilization in the agriculture by stimulating the parasitic phase of the fungus. Another experiment was conduced with barbados cherry plants. In this case, the experiment aimed to evaluate reapplication times to control M. enterolobii. It Was observed that 3 application/years increased plant height and root system mass. However, the number of galls increased in the same treatment. Treatments with lower values of fungus application per year (two applications and one application) promoted better control levels of M. enterolobii eggs. The knowledge of the optimal fungus reapplication time maximizes the amount of biocontrol agent used in the field, decreases application costs and increases the efficacy of biocontrol agent.