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Provedor de dados:  Trop. Plant Pathol.
País:  Brazil
Título:  Influence of internal seedborne Fusarium semitectum on cotton seedlings
Autores:  Costa,Maria L. N.
Dhingra,Onkar D.
Silva,Janaina L. da
Data:  2005-04-01
Ano:  2005
Palavras-chave:  Negative geotropism
Root rot
Seedborne inoculum
Cotton diseases
Gossypium hirsutum
Resumo:  Fusarium semitectum was found to be the major seed colonizing fungus in the commercial acid delinted cotton (Gossypium hirsutum) seed lots. There was no correlation, however, between its incidence and seedling emergence and disease symptoms on the emerged seedlings in autoclaved sand. Inoculation technique simulating internally seedborne nature of the fungus showed that the observed non-correlation might be related to the threshold level of seed coat colonization. The internally seedborne inoculum besides reducing seedling emergence, incited an array of symptoms on the emerged seedlings, which ranged from negative geotropism, leaf tearing, collar rot leading to dry root rot and seedling mortality. The dry root rot continued to develop on the plants surviving the seedling phase. The collar rot symptoms can be confused with those caused by Rhizoctonia solani.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  Sociedade Brasileira de Fitopatologia
Relação:  10.1590/S0100-41582005000200014
Formato:  text/html
Fonte:  Fitopatologia Brasileira v.30 n.2 2005
Direitos:  info:eu-repo/semantics/openAccess

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