Título:	Sampling plants for spittlebug eggs in pastures of Brachiaria decumbens.
Autor:	NILAKHE, S. S. MARTIN, P. B. VALERIO, J. R. KOLLER, W. W. SOUZA FILHO, J. A. G. de SILVA, A. A. da
Afiliación:	Consultor IICA; Consultor IICA; JOSE RAUL VALERIO, CNPGC; WILSON WERNER KOLLER, CNPGC; EMPAER; EMPAER.
Año:	1984
Referencia:	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 19, n. 8, p. 935-941, ago. 1984.
Descripción:	A sampling study of spittlebug eggs in pastures of Brachiaria decumbens was conducted by using a sample unit of 15 x 15 cm. The number os samples required for a certain level of precision was inversely proportional to population density. A crude estimate of number of samples necessary for 10, 15 and 20% of precision were 133,59 and 33, respectively. A study of sampling variation showed that differences between plots were much more important than the block differences; therefore plot to plot variation must be considered while sampling spittlebug eggs. The distribution pattern of numbers of eggs per 225 cm2 of pasture fitted the negative binomial series. The sequential sampling plan presented here would reduce the sampling time over the conventional (fixed sample numbers) sampling.
Thesagro:	Deois Flavopicta Zulia Entreriana
NAL Thesaurus:	Cercopidae
Palabras clave:	Sampling efficiency Sequential sampling Amostragem sequencial Eficiencia da amostragem
Notas:	Título em português: Planos de amostragem de ovos de cigarrinhas em pastagens de Brachiaria decumbens.
Tipo de Material:	Artigo de periódico
Acceso:	openAccess
Aparece en las colecciones:	Artigo em periódico indexado (CNPGC)