Data/hora: 13/06/2024 04:23:27

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 30/09/1993
Data da última atualização: | 30/09/1993
Autoria: | VEGAS, A.; OCHOA, F.; ALBARRACIN, N.; ARCIA, A.; BARRETO, T.; ROMERO, G.; GUTIERREZ, R.; TRUJILLO, G.; MENDT, R.
Afiliação: | Fundacion Servico para el Agricultor (FUSAGRI), Apartado 162,Cagua,Estado Aragua, Venezuela.
Título: | On the etilogy of the citrus sudden decline in Venezuela.
Ano de publicação: | 1991
Fonte/Imprenta: | Riverside, California: International Organization of Citrus Virologists, 1991.
Páginas: | p.297-302
Idioma: | Inglês
Notas: | Conference of the International Organization of Citrus Virologists, 11., 1991, Riverside, California, Proceedings...
Conteúdo: | Since 1985, a decline has been observed in sweet orange trees budded on Volkamer lemon. Diagnostic techniques have suggested similaries with the blight- declinio disease group. Isolates of Fusarium spp. from roots and shoots of plants were grown in potato-dextrose broth. Fungal structures were separated from the medium by centrifugation at low temperature. The supernatant was passed through a 0.2 um filter and infiltrated for 3 days into 1-yr- old sweet orange plants budded on Volkamerlemon. Toxin treated plants had a greater number of amorphous plugs and a higher zinc content than control plants. All plants showed twing dieback, but some of the infiltrated plants showed leaf flaccidity and zinc deficiency. In other experiments, soil was collected from the field near roots from healthy and affected trees and sweet orange on Volkamer lemon were potted with steam-sterilized and nosterile soil from both sources.After one yr, all plants were evaluated for visible symptoms, the presence of xylem plugs and the zinc content in the wood.It is possible that the Fusarium toxins play a role in the disease, but there was no transmission througjh soil in the pot test.
Palavras-Chave: | Citrus blight; Declinio; Fusarium spp.
Thesaurus Nal: | toxins.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (13314-1) - ADC - PL - -- - 634.3040601 - C748p - 1992000183 - DIS