Title:	Sampling procedures for spittlebug adults in pastures of Brachiaria decumbens.
Authors:	NILAKHE, S. S. SILVA, A. A. da SOUZA FILHO, J. A. G. de
Affiliation:	IICA; CNPGC; EMPAER.
Date Issued:	1984
Citation:	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 19, n. 9, p. 1065-1074, set. 1984.
Description:	A sampling study of spittlebug adults in pastures of Brachiaria decumbens was conduced to find an appropriate number of sweep-net sweeps/sample. Considering the relative variation (SE/X) X 100, and the total number of sweeps in the sampling, 10 sweeps/sample were found to be better than 5,20 our 40. The number of samples required for a particular level of relative variation at population densities>16 spittlebug adults/10 sweeps remained the same, whereas at densities<16, the number increased inversely. A regression model to convert relative estimates obtained by sweep-net method to the absolute estimate was presented. Considering the degree of precision and the time spent in sampling, the sweep-net method was superior to cage method. The distribution pattern of numbers of spittlebug adults in samples of 10 sweep-net sweeps, generally fitted the poisson series. A sequential plan presented here would reduce the sampling time over the conventional (fixed sample numbers) sampling.
Thesagro:	Amostragem Brachiaria Decumbens Cigarrinha das Pastagens Deois Flavopicta Pastagem Zulia Entreriana
NAL Thesaurus:	Cercopidae sampling
Keywords:	Spittlebugs Pasture
Notes:	Título em português: Procedimento de amostragem de adultos de cigarrinhas em pastagens de Brachiaria decumbens.
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPGC)