Data/hora: 03/06/2024 11:01:04

Biblioteca(s): | Embrapa Soja.
Data corrente: | 13/10/1992
Data da última atualização: | 28/10/2004
Autoria: | DELHEY, R.; KIEHR-DELHEY, M.
Afiliação: | Depto de Agronomia, Universidad Nacional del Sur, 8000 Bahia Blanca, Argentina.
Título: | Symptoms and epidemiological implications associated with oospore formation of Albugo tragopogonis on sunflower in Argentina.
Ano de publicação: | 1985
Fonte/Imprenta: | In: CONFERENCIA INTERNACIONAL DE GIRASOL, 11., 1985, Mar del Plata. Actas. Mar del Plata: ASAGIR/ISA, 1985.
Volume: | t.2
Páginas: | p.455-457.
Idioma: | Inglês
Conteúdo: | White blister disease, associated with asexual reproduction of Albugo tragopogonis, is common on sunflower in Argentina. In the southeast of the Province of Buenos Aires, hitherto unknown symptoms were observed in late plantings furing autumn 1984. The sumptoms consisted of greyish-green areas on stems, petioles and receptacles of sunflower plants in the post-flowering stage. The cortical tissues underlying those discoloured areas contained numerous oospores of A. tragopogonis; oogonia and antheridia were also present. The affected areas, especially on the receptacles, were invaded by other fungi known to produce head rots, such as Alternaria zinniae, A. alternata, Alternaria sp., Botrytis sp., and Rhizopus sp. The abundant oospore formation might constitute an important source of inoculum in the soil as well as on sunflower achenes.
Palavras-Chave: | Albugo tragopogonis; Disease; Fitopatologia; Fungos; Fungus; Phytopathology; Sunflower.
Thesagro: | Doença; Girassol.
Thesaurus Nal: | Argentina.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)