Data/hora: 19/06/2024 16:58:52

Biblioteca(s): 	Embrapa Soja.	
Data corrente: 	06/04/2004	
Data da última atualização: 	27/07/2007	
Autoria: 	MAIA, G. L.; SILVA, J. C.; MEYER, M. C.	
Título: 	Pathogenicity of Macrophomina phaseolina isolates from soybean.	
Ano de publicação: 	2004	
Fonte/Imprenta: 	In: WORLD SOYBEAN RESEARCH CONFERENCE, 7.; INTERNATIONAL SOYBEAN PROCESSING AND UTILIZATION CONFERENCE, 4.; CONGRESSO BRASILEIRO DE SOJA, 3., 2004, Foz do Iguassu. Abstracts of contributed papers and posters. Londrina: Embrapa Soybean, 2004.	
Páginas: 	p. 83.	
Série: 	(Embrapa Soja. Documentos, 228).	
Idioma: 	Inglês	
Notas: 	Editado por Flávio Moscardi, Clara Beatriz Hoffmann-Campo, Odilon Ferreira Saraiva, Paulo Roberto Galerani, Francisco Carlos Krzyzanowski, Mercedes Concordia Carrão-Panizzi.	
Conteúdo: 	Soybean Charcoal Rot, caused by Macrophomina phaseolina is a widespread disease in the soybean cropped area in Brazil. This work aimed to evaluate the pathogenicity of three isolates of M. phaseolina from infected soybean plants collected in Balsas, Maranhão; one from Bom Jesus, Piauí and one from Humaitá, Amazonas. The inocula was prepared by transferring PDA discs containing fungi structures (0.5mm in diameter) to PDA plates with toothpick pieces disposed on the medium, and incubated during 14 days at 25±2°C. Soybean plants cv. MSoy 9010 cultivated in greenhouse (4 plants/pot) were inoculated by introducing a colonized toothpick piece into the plant stem. The pathogenicity of isolates was evaluated by the average of plant death. The results showed a large variance on pathogenicity of the isolates, ranging from 6.25%, 68.8% and 75% for the isolates from Maranhão, respectively; 43.8% for the isolate from Amazonas and 87.5% for the isolate from Piauí.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Soja (CNPSO)	
Exemplares: 	CNPSO - (23692-1) - UMT - PL - -- - RF 633.34072 - W927a -  - DIS