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Registros recuperados : 185 | |
Registros recuperados : 185 | |
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Registro Completo
Biblioteca(s): |
Embrapa Gado de Corte; Embrapa Unidades Centrais. |
Data corrente: |
30/05/1992 |
Data da última atualização: |
09/07/1998 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
NILAKHE, S. S.; SILVA, A. A. da; SOUZA FILHO, J. A. G. |
Afiliação: |
CNPGC. |
Título: |
Sampling procedures for spittlebug adults in pastures of Brachiaria decumbens. |
Ano de publicação: |
1984 |
Fonte/Imprenta: |
Pesquisa Agropecuaria Brasileira, Brasilia, v.19, n.9, p. 1065-1074,set. 1984. |
Idioma: |
Inglês |
Conteúdo: |
A sampling study of spittlebug adults in pastures of Brachiaria decumbens was conducted 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 or 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. |
Palavras-Chave: |
Amostragem sequencial; Brasil; Campo Grande; Cigarrinha da Pastagem; Eficiencia da amostragem; Mato Grosso do Sul; Pasture; Sampling efficiency; Sequential sampling; Spittlebugs. |
Thesagro: |
Amostragem; Brachiaria Decumbens; Cerrado; Cigarrinha das Pastagens; Deois Flavopicta; Doença; Inseto; Pastagem; Praga; Zulia Entreriana. |
Thesaurus NAL: |
Cercopidae; sampling. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/203821/1/Sampling-procedures-for-spittlebug-adults.pdf
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Marc: |
LEADER 02120naa a2200409 a 4500 001 1104801 005 1998-07-09 008 1984 bl uuuu u00u1 u #d 100 1 $aNILAKHE, S. S. 245 $aSampling procedures for spittlebug adults in pastures of Brachiaria decumbens. 260 $c1984 520 $aA sampling study of spittlebug adults in pastures of Brachiaria decumbens was conducted 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 or 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. 650 $aCercopidae 650 $asampling 650 $aAmostragem 650 $aBrachiaria Decumbens 650 $aCerrado 650 $aCigarrinha das Pastagens 650 $aDeois Flavopicta 650 $aDoença 650 $aInseto 650 $aPastagem 650 $aPraga 650 $aZulia Entreriana 653 $aAmostragem sequencial 653 $aBrasil 653 $aCampo Grande 653 $aCigarrinha da Pastagem 653 $aEficiencia da amostragem 653 $aMato Grosso do Sul 653 $aPasture 653 $aSampling efficiency 653 $aSequential sampling 653 $aSpittlebugs 700 1 $aSILVA, A. A. da 700 1 $aSOUZA FILHO, J. A. G. 773 $tPesquisa Agropecuaria Brasileira, Brasilia$gv.19, n.9, p. 1065-1074,set. 1984.
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Registro original: |
Embrapa Unidades Centrais (AI-SEDE) |
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