Data/hora: 03/06/2024 10:53:02

Provedor de dados: | 102
País: | Brazil
Título: | Powders of kudzu, velvetbean, and pine bark added to soil increase microbial population and reduce Southern blight of soybean
Autores: | Blum,Luiz E. B.; Rodríguez-Kábana,Rodrigo.
Data: | 2006-12-01
Ano: | 2006
Palavras-chave: | Sclerotium rolfsii; Stem rot; Soil amendments; Mucuna; Trichoderma.
Resumo: | Southern blight (Sclerotium rolfsii) of soybean (Glycine max) is an important disease throughout the world. Some soil amendments can reduce disease levels by improving soil microbial activity. The main goals of this study were to investigate the effects of soil amendments such as dried powders of kudzu (Pueraria lobata), velvetbean (Mucuna deeringiana), and pine bark (Pinus taeda), on soil microbial population and disease caused by S. rolfsii on soybean. Pine bark, velvetbean (mucuna) and kudzu (25 g kg-1) added to soil were effective in reducing disease incidence [non-amended (NA) ~ 39%; amended (A) ~ 2 to 11%)]. Bacillus megaterium was the bacteria most frequently isolated in soils with velvetbean or kudzu (NA ~ log 5.7 CFU g-1 of dried soil; A ~ log 6.2). Soils with velvetbean and kudzu stimulated increase in population of Enterobacter aerogenes (NA ~ log 3; A ~ log 5.1-5.8). Pseudomonas putida population was higher in A than in NA (NA ~ log 4; A ~ log 5.5), and was negatively correlated (r = -0.83, P = 1%) to disease incidence. Soil amended with kudzu and pine bark stimulated increases in populations of Trichoderma koningii (NA ~ log 1.6; A ~ log 2.9) and Penicillium citreonigrum (NA ~ log 1.3; A ~ log 2.6), respectively. Penicillium herquei soil population increased with addition of kudzu (NA ~ log 1.2; A, ~ log 2.5). These microorganisms are antagonists of soil-borne pathogens. Powders of velvetbean, kudzu, and pine bark can increase antagonistic population in soil and reduce disease.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582006000600003
Editor: | Sociedade Brasileira de Fitopatologia
Relação: | 10.1590/S0100-41582006000600003
Formato: | text/html
Fonte: | Fitopatologia Brasileira  v.31 n.6 2006
Fonte: | info:eu-repo/semantics/openAccess