Propagation of avirulent race of rice blast fungus on rice and ragi (finger millet) leaves previously infected with virulent blast fungus

agentes nocivos anatomia anatomie anatomy arroz biological properties cereales cereals champignon coracan crops cultivos cultivos de grano diseases economic plants enfermedades fungosas facteur nuisible feuille finger millet fungi grain crops hojas infectivity injurious factors leaves microbial properties mijo africano mijos millet millets mycose mycoses plant anatomy plantas plante plante de culture plants poder infeccioso poder microbiano pouvoir infectant rice riz taxa taxon taxonomia taxonomie taxonomy variedades varieties