A new biocontrol agent of Drechslera oryzae


  • Francisca Sempere Departamento de Estadística e Investigación Operativa. Escuela Técnica Superior de Ingeniería del Diseño. Universidad Politécnica de Valencia.
  • M.ª Pilar Santamarina Siurana Departamento de Ecosistemas Agroforestales. Escuela Técnica Superior de Ingeniería Agronómica y del Medio Natural. Universidad Politécnica de Valencia




Drechslera oryzae, Trichoderma harzianum, antagonist, rice


The rice pathogen Drechslera oryzae and the antagonistic fungus Trichoderma harzianum were inoculated in the same substratum at different environmental conditions. The mechanisms exerted by T. harzianum as antagonist over D. oryzae and that on some occasions acted sinergically were: competitiveness for space and nutrients, mycoparasitism and a possible antibiosis. The antagonistic capacity of T. harzianum was higher as the values of water activity and temperature were increasing.


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