| Registro completo |
| Provedor de dados: |
Trop. Plant Pathol.
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| País: |
Brazil
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| Título: |
Potential of non-pathogenic Fusarium oxysporum isolates for control of Fusarium wilt of tomato
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| Autores: |
Silva,Juliano C. da
Bettiol,Wagner
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| Data: |
2005-08-01
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| Ano: |
2005
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| Palavras-chave: |
Biological control
Fusarium oxysporum f.sp. lycopersici race 2
Nonpathogenic F. oxysporum
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| Resumo: |
This study was done to evaluate the efficiency of non-pathogenic Fusarium oxysporum isolates (141/3, 233, 233/1, 245, 245/1, 251, 251/2, 251/5, and 257) in controlling vascular wilt caused by F. oxysporum f. sp. lycopersici, race 2 (isolates C-21A, TO11, and TO245) in tomato (Lycopersicon esculentum) cv. Viradoro seedlings. In order to determine the effect of non-pathogenic F. oxysporum isolates in tomato plants, the root system of 30-day-old seedlings was immersed in conidial suspensions (10(6) ml-1) of each isolate and the seedlings were transplanted to a cultivation substrate. Thirty-five days after transplanting it was observed that the non-pathogenic F. oxysporum isolates were not pathogenic to the cv. Viradoro nor did they affect seedling development. The efficiency of the non-pathogenic F. oxysporum isolates in controlling Fusarium wilt was determined by immersing the tomato seedling roots in the conidial suspension (10(6) ml-1) of each isolate and then transplanting them into substrates previously infested with isolates of F. oxysporum f.sp. lycopersici, race 2 (10(5) conidia ml-1 of substrate). Evaluations were performed 35 days after transplanting, for severity in scale with 1=healthy plant to 6=dead plant or plant showing vessel browning and wilted leaves up to the leader shoot and seedling height. The non-pathogenic F. oxysporum isolates were efficient in reducing the severity of the disease and maintaining normal plant development. These results provide evidence of the antagonistic activity of non-pathogenic F. oxysporum isolates in controlling vascular wilt caused by F. oxysporum f. sp. lycopersici race 2 in tomato.
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| Tipo: |
Info:eu-repo/semantics/other
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582005000400012
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| Editor: |
Sociedade Brasileira de Fitopatologia
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| Relação: |
10.1590/S0100-41582005000400012
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| Formato: |
text/html
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| Fonte: |
Fitopatologia Brasileira v.30 n.4 2005
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| Direitos: |
info:eu-repo/semantics/openAccess
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