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Ramularia rubella and Uromyces rumicis infecting Rumex obtusifolius in the Azores
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Orientador(es)
Resumo(s)
Rumex spp. (Polygonaceae), namely Rumex obtusifolius L., are considered as
weeds in permanent pastures in São Miguel island (Azores), demanding manual and
chemical control. However, R. obtusifolius plants are found to be heavily infected
by Ramularia rubella (Bon.) Nannf. or by Uromyces rumicis (Schum.) Wint. This
is the first record of R. rubella for the Azores. This hyphomycete infects all the
phenophases of R. obtusifolius and is found widely distributed on São Miguel island. Infected leaves of R. obtusifolius may present more than one hundred red spots each, as well as conidiophores and conidia. U. rumicis, already recorded for the
Azores on Rumex pulcher L., was now found infecting all the phenophases of R.
obtusifolius in São Miguel island. Leaves infected by the rust become chlorotic and
covered by uredosori and uredospores. In late summer teleosori and teleospores were
also found. Both fungi are potential biological control agents of Rumex spp. in the Azores.
Descrição
Palavras-chave
Biological Control Ramularia rubella (Bon.) Rumex obtusifolius L. Rumex pulcher L. São Miguel Island (Azores) Uromyces rumicis (Schum.)
Contexto Educativo
Citação
SILVA, L., J. TAVARES & R. BRASSEUR, (1997). Ramularia rubella and Uromyces rumicis infecting Rumex obtusifolius in the Azores. "Açoreana. Revista de Estudos Açoreanos", 8(3): 375-381.
Editora
Sociedade Afonso de Chaves