Data/hora: 09/06/2024 20:34:12

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 25/01/2006
Data da última atualização: | 29/05/2018
Autoria: | BRESSAN, W.; FIGUEIREDO, J. E. F.
Afiliação: | JOSE EDSON FONTES FIGUEIREDO, CNPMS.
Título: | Biological control of Stenocarpella maydis in maize seed with antagonistic Streptomyces sp. isolates.
Ano de publicação: | 2005
Fonte/Imprenta: | Journal of Phytopathology, Berlin, v. 153, n. 10, p. 623-626, 2005.
Idioma: | Inglês
Conteúdo: | The effectiveness of two Streptomyces sp. isolates, isolated from maize rhizosphere soil and designated as DAUFPE 11470 and DAUFPE 14632, was evaluated in vitro and under greenhouse conditions for control of Stenocarpella maydis in maize seeds. Stenocarpella maydis incidence was detected in all subsamples of disease-free maize seeds by in vitro survey test, and ranged from 10.8% to 65.2%. In a filter paper test with surface-disinfected seeds inoculated with S. maydis, Streptomyces sp. isolates DAUFPE 11470 and DAUFPE 14632 significantly reduced (P<=0.05) the pathogen incidence by 93.2% and 92.3%, respectively. Seed germination in the same treatments was increased by 30.0% and 28.2%, respectively. Treatments of non-disinfected seeds with the isolates DAUFPE 11470 and DAUFPE 14632, under greenhouse conditions reduced disease incidence in the seedlings by 87.3% and 85.6%, respectively. The reductions in disease incidence in surface-disinfected seeds were 85.0% and 83.0% for the same isolates. Seedling emergence significantly (P<=0.05) increased in disinfected and non-disinfected seeds inoculated with the Streptomyces sp. isolates. The results indicate the potential of using Streptomyces sp. isolates as an additional tool to control Stenocarpella ear rot by significantly reducing the incidence of S. maydis in maize seeds and seedlings.
Palavras-Chave: | Fungal diseases; Plant diseases.
Thesaurus Nal: | biological control agents; corn; plant pathogenic fungi; plant pathogens; seed germination; seedling emergence; seedlings; seeds.
Categoria do assunto: | H Saúde e Patologia
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (18312-1) - UPC - AP - DD -  -  -  - DIS