Data/hora: 22/06/2024 03:19:40

Biblioteca(s): | Embrapa Mandioca e Fruticultura.
Data corrente: | 29/04/1997
Data da última atualização: | 29/04/1997
Autoria: | OLSON, E. O.
Afiliação: | U.S. Department of Agriculture and Texas Agricultural Experiment Station, Weslaco, Texas.
Título: | Symptomless carriers and their role in the spread of citrus viruses.
Ano de publicação: | 1959
Fonte/Imprenta: | Riverside, California: University of California, 1959
Páginas: | p.185-189
Idioma: | Inglês
Notas: | In: CONFERENCE ON CITRUS VIRUS DISEASES, 1957, Riverside, California. Proceedings... Riverside, California: University of California, 1959.
Conteúdo: | Many individuals and organizations have unwittingly introduced citrus viruses into new areas or spread them around the world, usually in budwood from or in apparently healthy plants. Viruses spread in this manner include psorosis, tristeza, cachexia, xyloporosis, and exocortis. Virus-infected but apparently healthy plants have become reservoirs of infection from which the citrus viruses have been spread by man from one country to another and from one citrus variety to another. When a virus like tristeza is once introduced, insects may apread it from tree to tree and orchard to orchard. Virus spread is not evident in symptomless plants. It is detected only in virus-sensitive plants when there are recognizable symptoms on leaves, stems, or bark, and when stunting or death occurs. Symptomless carriers of one virus or virus strain are not necessarily symptomless when infected by a different virus or virus strain.
Palavras-Chave: | Citros; Citrus sp; Congress; Congresso; Disease; Rootstock; Sintomas; Symptoms; Tristeza; Viroses.
Thesagro: | Doença; Rizoma; Vírus.
Thesaurus Nal: | Citrus; viruses.
Categoria do assunto: | --
Registro original: | Embrapa Mandioca e Fruticultura (CNPMF)
Exemplares: | CNPMF - (13747-1) - ADD - PL - -- - 634.30406 - C748v - 1981000254 - DIS