Data/hora: 08/06/2024 12:54:26

Biblioteca(s): 	Embrapa Soja.	
Data corrente: 	25/09/2006	
Data da última atualização: 	26/07/2017	
Autoria: 	MEYER, M. C.; BUENO, C. J.; SOUZA, N. L. de; YORINORI, J. T.	
Título: 	Effect of doses of fungicides and plant resistance activators on the control of Rhizoctonia foliar blight of soybean, and on Rhizoctonia solani AG1-IA in vitro development.	
Ano de publicação: 	2006	
Fonte/Imprenta: 	Crop Protection, Tarrytown, v. 25, n. 8, p. 848-854, Aug. 2006.	
Idioma: 	Inglês	
Conteúdo: 	Rhizoctonia foliar blight (RFB) of soybean [Glycine max (L.) Merrill] occurs in many tropical and subtropical regions, causing yield reductions of up to 70% and in Brazil, up to 60%. The disease is caused by Rhizoctonia solani AG1- IA and AG1-IB, and by AG2-3 in Japan. RFB occurs in the North, Northeast and Mid-west regions of Brazil. Chemical control remains the only effective method of controlling RFB, but its efficiency depends upon environmental conditions. In this study, 18 fungicides, salicylic acid (SA) and acibenzolar-s-methyl (ASM) were evaluated on R. solani AG1-IA in vitro, by mycelial growth rating and estimating effective concentration for 50% (EC 50) and 90% (EC 90) inhibition of mycelial growth, and in vivo by reduction of disease severity on soybean plants in greenhouse conditions. Mycelial growth was strongly inhibited by the fungicides pyraclostrobin+boscalid and fludioxonil. Preventive fungicide applications were the most effective. Strobilurins were more efficient both in preventive and curative applications. Best results with plant resistance activators were obtained with SA (2.5 mM) sprayed at 20 d before inoculation and with ASM (12.5 mg a.i. 1-¹) 10 d before inoculation.	
Thesagro: 	Controle Químico; Doença de Planta; Soja.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Soja (CNPSO)	
Exemplares: 	CNPSO - (26649-1) - UPC - SP - -- - 11089 -  - 11089 - DIS