Data/hora: 10/06/2024 01:02:39

Biblioteca(s): 	Embrapa Agroindústria Tropical.	
Data corrente: 	18/09/1993	
Data da última atualização: 	18/09/1993	
Autoria: 	TIMMER, L. W.; AGOSTINI, J. P.; GRAHAM, J. H.; CASTLE, W. S.	
Título: 	Relationship of citrus rootstock to pphytophthora root rot and populations of Phytophthora parasitica.	
Ano de publicação: 	1991	
Fonte/Imprenta: 	Proceedings of the Florida State for Horticultural Society, v.104, p.173-178, 1991.	
Idioma: 	Inglês	
Conteúdo: 	Inoculations of citrus rootstocks with chlamydospores of P. paasitica in the greenhouse produced the most fibrous root rot on sweet orange (SwO), sour orange (SO), Carrizo citrange (CC), and Cleopatra mandarin (CM), less on Volkamer lemon (VL) and least on trifoliate orange (TO) and Swingle citrumelo (SC). Propagule densities from rootstock seedlings grown in pots of infested soil were greatest on SwO and SO, less on CM, and least on TO and SC. The effects of inoculum density and metalaxyl treatment were evaluated in a pot test on SwO, SO, and SC budded with `Pineapple' sweet orange. Inoculation of SC with P. parasitica produced little root rot and had no effect on growth. Fungicide treatment did not affect growth of trees on this rootstock. On SwO and SO,root rot and had not effect on growth. Fungicide treatment did not affect growth of trees on this rootstock. On SwO and SO, root rot increased and growth decreased as inoculum density increased. Metalaxyl treatment reduced root rot and increased growth of trees on these 2 rootstocks. In field rootstock trials in Avon Park and St. Cloud, propagule densities of the fungus were wighesto on Palestine sweet lime, SwO, and VL; lower on CM; and lowest on TO and SC. Most of the common rootstocks used in Florida with the exception of sweet orange are tolerant to bark infection; however, all except SC and TO are susceptible to fibrous root rot.	
Palavras-Chave: 	Citros - Phytophthora parasitica; Citros - porta - enxerto; Citrus - inoculacao.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Agroindústria Tropical (CNPAT)	
Exemplares: 	CNPAT - (806-1) - EMB - SP - -- - SP 01105 -  - 92.01105 - DIS