TRANSMISSIBILITY OF Fusarium oxysporum f. sp. vasinfectum INOCULATED IN COTTONSEEDS

Authors

  • Rodrigo Porfírio Pinheiro Universidade do Estado de Mato Grosso
  • Dejânia Vieira Araújo Universidade do Estado de Mato Grosso
  • João Paulo Ascari Universidade do Estado de Mato Grosso
  • Marcelo de Carvalho Alves Universidade Federal de Mato Grosso
  • Janile Tamiozzo Mainardi Agrodinâmica Pesquisa e Consultoria Agropecuária

DOI:

https://doi.org/10.3738/1982.2278.2917

Keywords:

Gossypium hirsutum, seed pathology, inoculation.

Abstract

The objective of this study was to evaluate the transmissibility of Fusarium oxysporum f.sp. vasinfectum by inoculated cottonseeds. The cottonseeds were inoculated using the water restriction technique, at different times of exposure. A completely randomized design was used in the laboratory and a randomized design with blocks was used in the field experiment, with a 2x5 factorial arrangement with two cultivars (FMT 701 and Delta Opal) and five times of exposure of the pathogen in seeds (0 h, 24 h, 48 h, 72 h and 96 h). There was a reduction in the percentage of germination with the increase of the infection of the seeds when in greater time of contact with the fungus. Delta Opal cultivar presented minor disease index and major pathogen incidence when compared to FMT 701 cultivar. The rates of infection and transmission of the seed pathogen were effective and directly proportional to the inoculum potential in the seeds, with rates of 95% and 1.2%, respectively.

Author Biographies

  • Rodrigo Porfírio Pinheiro, Universidade do Estado de Mato Grosso
    Engenheiro Agronomo
  • Dejânia Vieira Araújo, Universidade do Estado de Mato Grosso
    Professora de Fitopatologia da Universidade do Estado de Mato Grosso, Tangará da Serra, MT, Brasil.
  • João Paulo Ascari, Universidade do Estado de Mato Grosso
    Engenheiro Agrônomo, Mestre em Ambiente e Sistema de Produção Agrícola, Doutorando em Fitopatologia.
  • Marcelo de Carvalho Alves, Universidade Federal de Mato Grosso
    Professor da Faculdade de Agronomia e Medicina Veterinária, Departamento de Solos e Engenharia Rural, Universidade Federal de Mato Grosso, Cuiabá, MT, Brasil
  • Janile Tamiozzo Mainardi, Agrodinâmica Pesquisa e Consultoria Agropecuária
    Mestre em Produção Vegetal, Agrodinâmica Pesquisa e Consultoria Agropecuária, Tangará da Serra, MT, Brasil.

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Published

2018-10-31

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Section

Articles

How to Cite

TRANSMISSIBILITY OF Fusarium oxysporum f. sp. vasinfectum INOCULATED IN COTTONSEEDS. (2018). Nucleus, 15(2), 195-205. https://doi.org/10.3738/1982.2278.2917

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