Data/hora: 04/06/2024 17:32:36

Provedor de dados: 	102	
País: 	Brazil	
Título: 	Dried powders of velvetbean and pine bark added to soil reduce Rhizoctonia solani-induced disease on soybean	
Autores: 	Blum,Luiz E. B.; Rodríguez-Kábana,Rodrígo.	
Data: 	2006-06-01	
Ano: 	2006	
Palavras-chave: 	Glycine max; Mucuna deeringiana; Damping-off; Microbial activity.	
Resumo: 	Diseases induced by Rhizoctonia solani, like damping-off and root and stem rot on soybean (Glycine max), are a serious problem around the world. The addition of some organic material to soil is an alternative control for these diseases. In this study, benzaldehyde and dried powders of kudzu (Pueraria lobata), velvetbean or mucuna (Mucuna deeringiana), and pine bark (Pinus spp.) were used in an attempt to improve soybean plant growth and to reduce the disease R. solani (AG-4) causes on soybean. Benzaldehyde (0.1-0.4 mL/kg of soil) and velvetbean (25-100 g/kg) significantly (P &lt; 0.05) reduced mycelial growth of R. solani in laboratory tests. In greenhouse experiments, the percentage of non-diseased plants was higher in treatments with pine bark and velvetbean (50-100 g/kg). In soil treated with kudzu (r²=0.91) or velvetbean (r²=0.94), increasing rates of these amendments tended to increase plant fresh mass. In microplot field conditions, soil amended with velvetbean (r²=0.85) and pine-bark (r²=0.61) significantly reduced disease on soybean. Numbers of Bacillus megaterium (r²=0.87) and Trichoderma hamatum (r²=0.92) and hydrolysis of fluorescein diacetate (r²=0.91) were higher in soil amended with increasing rates of velvetbean, indicating an increase in microbial activity. From this study it is concluded that dried powders of velvetbean and pine bark added to soil can reduce Rhizoctonia-induced disease on soybean.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582006000300004	
Editor: 	Sociedade Brasileira de Fitopatologia	
Relação: 	10.1590/S0100-41582006000300004	
Formato: 	text/html	
Fonte: 	Fitopatologia Brasileira  v.31 n.3 2006	
Fonte: 	info:eu-repo/semantics/openAccess