Data/hora: 17/06/2024 02:35:53

Biblioteca(s): | Embrapa Soja.
Data corrente: | 13/10/1992
Data da última atualização: | 29/10/2004
Autoria: | YORINORI, J. T.; HENNING, A. A.; FERREIRA, L. P.; HOMECHIN, M.
Afiliação: | EMBRAPA-CNPSo. Londrina, PR.
Título: | Diseases of sunflower in Brazil.
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.459.
Idioma: | Inglês
Conteúdo: | The development of sunflower (Helianthus annuus L.) diseases in Brazil in the past four years has been accompanied by annual surveys. To this date 16 diseases have been recorded byt only a few have shown to be important. Diseases caused by fungi: Sclerotinia wilt and head rot (S. sclerotiorum), rust (Puccinia helianthi), Sclerotium wilt and damping off (S. rolfsii), Rhizoctonia root rot (R. solani), charcoal rot (Macrophomina phaseolina), Rosellinia root rot (Rosellinia sp. ), Phoma black stem (P. oleracea var. helianthi tuberosi), downy mildew (Plasmopara halstedii), botrytis head rot or gray mold (B. cinerea), Alternaria leaf and stem spots (A. helianthi and A. zinniae), powdery mildew (Erysiphe cichoracearum); and Phomopsis stem blight (Phomopsis sp.).Disease caused by virus: sunflower mosaic virus. Diseases coused by bacteria: stinky stem rot (Erwinia sp.) and stem, petiole and leaf spots caused by a fluorescent Pseudomonas sp. These diseases may cause severe damage on developing sunflower plants under continued rainfall. Disease caused by nematodes: root knot nematode (Meloidogyne incognita and M. javanica). The most important diseases have been Sclerotinia wilt and head rot and Alternaria stem and leaf spots (Al helianthi) These two diseases have been mostly responsible for the decline of sunflower production in the state of Parana, the major producing state. From an area of aproximately 80,000 h in 1981 it was reduced to nwarly 5,000 ha in 1984. Yield losses have ranged from negligeable to 100%, ...
Palavras-Chave: | Brasil; Disease; Fitopatologia; Fungus; Nematode; Phytopathology; Sunflower.
Thesagro: | Bactéria; Doença; Fungo; Girassol; Nematóide.
Thesaurus Nal: | Brazil.
Categoria do assunto: | --
Registro original: | Embrapa Soja (CNPSO)