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Please use this identifier to cite or link to this item: http://hdl.handle.net/10198/5671

Título: Dectetion of Verticillium dahliae kleb from olive trees with chronic decline and dieback of branches and shoots
Autor: Gouveia, Eugénia
Coelho, Valentim
Palavras-chave: Verticilosis
Olea europea
Issue Date: 2007
Editora: Instituto Politécnico de Bragança, Escola Superior Agrária
Citação: Gouveia, Eugénia; Coelho, Valentim (2007) - Dectetion of Verticillium dahliae kleb from olive trees with chronic decline and dieback of branches and shoots. In 3º European Meeting of the IOBC/WPRS - Integrated protection of olive Crops. Bragança
Resumo: Verticillium wilt of olive tree, associated with the soil borne fungus Verticillium dahliae Kleb., is considered an important disease in all countries of the Mediterranean region. This disease has been increasing in newly established olive orchards which have a negative economic impact in all regions of olive culture. In Portugal Verticillium wilt has not been considered an important disease and few studies were carried out about this disease. Recently, a great number of cases of chronic decline, slow growth and dieback of shoots and branches of olive trees have been reported in all regions where extensive plantations had occurred. These symptoms are characteristic of Verticillium wilt in olive tree, but very often are also associated with adverse environmental or agronomic conditions or inclusively with mechanical damages which hampered diagnosis of biological causes. In some of these reported situations and for diagnostic purposes we isolated Verticillum dahliae from plant tissues of trees with characteristic symptoms of decline and slow growth. The sample of plant tissues were tap water cleaned and surface disinfected with sodium hypochloride and incubated on PDA (Potato Dextrose Agar) in Petri dishes at 22-23 ºC in the dark. Positive isolation of the suspected pathogen has not been always obtained even though the same laboratory procedure was adopted.
Arbitragem científica: yes
URI: http://hdl.handle.net/10198/5671
Appears in Collections:PTV - Resumos em Proceedings Não Indexados ao ISI

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