Data/hora: 17/06/2024 02:28:10

Biblioteca(s): 	Embrapa Cerrados; Embrapa Gado de Corte.	
Data corrente: 	01/02/1991	
Data da última atualização: 	01/02/1991	
Autoria: 	NILAKHE, S. S.; PASCHOAL, G. O.; SILVA, A. A. da; CORSINI, P. S.	
Afiliação: 	EMBRAPA. Centro Nacional de Pesquisa de Gado de Corte (Campo Grande, MS).	
Título: 	Sampling efficiency of different sample units and procedures to sample spittlebug eggs.	
Ano de publicação: 	1988	
Fonte/Imprenta: 	Pesquisa Agroecuaria Brasileira, Brasilia, v.23, n.3, p.213-218, mar. 1988.	
Idioma: 	Inglês	
Notas: 	CNPGC. 	
Conteúdo: 	A sampling study of stittlebug eggs in pastures of Brachiaria decumbens Stapf was conducted by samples of 25, 50 and 75 cm2 of the pasture. The sampling efficiency of three sample units was compared by calculating the number of sample necessary to  obtain a certain level of  precision (proportion of standard error mean expressed as a percentage). The sampling efficiency of 50 cm2 sample  unit was poor in comparison to 25 and 75 cm2. To obtain the same level of precision e.g., 20%, the pasture area do be examined was slightly smaller for 75 cm2 unit than for 25 cm2 at lower egg density (1/25 cm2); however, such advantage of the 75 cm2 disappered at egg density of  4/25 cm2. Based on this finding and the fact that fewer sample would be taken in the case of 75 cmthan the 25 cm2, unit the use of former was suggested. The distribution pattern of number of eggs per 25 or 50 cm2 of pasture fitted the negative binomial series.	
Palavras-Chave: 	Brasil; Cigarrinha da Pastagem; Dourados; Mato Grosso do Sul.	
Thesagro: 	Amostragem; Brachiaria Decumbens; Cerrado; Deois Flavopicta; Entomologia; Ovo; Pastagem; Zulia Entreriana.	
Thesaurus Nal: 	Cercopidae.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Gado de Corte (CNPGC)	
Exemplares: 	CNPGC - (4694-1) - EMB - AP - -- - 630.5 -  - 630.5 - DIS
CPAC - (4931-1) - ADD - AP - -- - CRI3362 -  - CRI3362 - DIS