Data/hora: 22/09/2024 00:10:37

Biblioteca(s): 	Embrapa Cerrados.	
Data corrente: 	17/03/2005	
Data da última atualização: 	17/03/2005	
Autoria: 	SHARMA, R. D.; AMABILE, R. F.	
Título: 	Fitonematóides associados a genótipos de gergelim em condições de cerrado.	
Ano de publicação: 	1999	
Fonte/Imprenta: 	Nematologia Brasileira, Piracicaba, v. 23, n. 1, p. 84-87, 1999.	
Idioma: 	Português	
Conteúdo: 	During April 1993 a nematode survey was conducted in an experimental are of Embrapa Cerrados, Planaltina, Federal District of Brazil, where 21 genotypes of sesame (Sesamum indicum L.) were sampled for nematode presence. Four composite soil and root samples were collected from the rhizospheres of cach genotype before harvest. The nematodes were extracted from 100g of soil and 10g of roots utilizing modified Coolen's method. Seven species of plant-parasitic nematodes, with decreasing frequency of occurence in genotypes were: Pratylenchus brachyurus (100%), Aphelenchoides sp. (100%), Ditylenchus sp. (100%), Helicotylenchus dihystera (67%), Paratrichodorus minor (67%) and Criconemella ornata (48%). Two species of mycophagos nematodes were found, and their frequency of occurrence in genotypes was: Aphelenchus avenae (100%) and Tylenchus sp. (95%). Free-living nematodes were present in all the samples. The average population densities of P. brachyurus varied between 3 per sample for genotype Aceiteira SN 2 and 56 for genotype Seridó 01 SM2; H. dihystera, Criconemella ornata e P. minor population densities/sample, when found, were present in very low numbers. 	
Palavras-Chave: 	Nematóde.	
Thesagro: 	Cerrado; Gergelim; Sesamum Indicum.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Cerrados (CPAC)	
Exemplares: 	CPAC - (25748-1) - UPC - SP - -- - CRI6674 -  -  - DIS