Data/hora: 09/06/2024 12:34:11

Provedor de dados: 	63	
País: 	Brazil	
Título: 	Yield of varieties of Cucurbita pepo preimmunized with mild strains of Papaya ringspot virus - type W and Zucchini yellow mosaic virus	
Autores: 	Bonilha,Estela; Gioria,Ricardo; Kobori,Rômulo Fujito; Vecchia,Paulo Tarcísio Della; Piedade,Sônia Maria de Stefano; Rezende,Jorge Alberto Marques.	
Data: 	2009-06-01	
Ano: 	2009	
Palavras-chave: 	Control; Potyvirus; Cross protection; Cucurbitaceae.	
Resumo: 	Papaya ringspot virus - type W (PRSV-W) and Zucchini yellow mosaic virus (ZYMV) are the most prevalent viruses in cucurbit crops in Brazil and responsible for frequent yield losses. Diseases caused by these viruses are difficult to control. The objective of this work was to evaluate the effects of mild strains PRSV-W-1 and ZYMV-M on the yield of Cucurbita pepo L. cvs. Samira, Novita Plus, AF 2847, and Yasmin, under plastic greenhouse and field conditions. Plants infected with ZYMV-M and grown in a plastic greenhouse did not exhibit typical leaf symptoms or significant alterations in quantitative and qualitative fruit yield. However, when infected with PRSV-W-1, or PRSV-W-1 + ZYMV-M, the plants exhibited severe leaf mosaic symptoms and reduced fruit quality, although there were no changes in the number and mean fruit weight harvested from these plants. When these plants were infected with PRSV-W-1 and studied simultaneously in the field and plastic greenhouse, intensification of symptoms in the fruits and leaves was more pronounced under the greenhouse conditions. Quantitative yield did not change. Environmental factors seem to influence symptoms induced by PRSV-W-1.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000300019	
Editor: 	São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"	
Relação: 	10.1590/S0103-90162009000300019	
Formato: 	text/html	
Fonte: 	Scientia Agricola  v.66 n.3 2009	
Fonte: 	info:eu-repo/semantics/openAccess