Sample size for assessment of cladode brown spot in prickly pear cactus

Autores
Garcete-Gómez, José María; Conforto, Erica Cinthia; Domínguez-Monge, Santiago; Flores-Sánchez, Jorge Luis; Mora-Aguilera, Gustavo; Michereff, Sami Jorge
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Cladode brown spot (CBS) is an important disease of prickly pear cactus (Nopalea cochenillifera) in Brazil. No standard method exists for sampling in the field. A study was conducted in 30 fields of prickly pear (cv. Miúda) in Pernambuco state, Brazil, to determine the optimal sample size to assess severity of CBS. In each field, a 0.3 ha (45 × 68 m) test area consisting of 30 rows and 45 plants per row (1350 plants per test area) was arbitrarily chosen. In each test area, 50 plants were sampled using a systematic method and the disease severity was assessed with the aid of a standard area diagram set on 2, 4 and 6 cladodes/plant. The spatial pattern of the disease was examined by spatial autocorrelation analysis and the optimal sample sizes were determined based on three levels of error (5, 10 and 20%). CBS severity in the fields ranged from 0.4 to 8.7%. In 15 fields the disease severity of CBS was >4.0% and in 20 fields the spatial pattern of CBS was aggregated. There was a positive correlation (r = 0.59, P = 0.0001) between disease severity and strength of aggregation, and a negative correlation (r = −0.39; P = 0.0001) between disease severity and sample size (number of plants). There was no significant effect (P = 0.3) of the number of cladodes assessed per plant (2, 4 or 6 cladodes) on sample size. Considering a sample of two cladodes per plant and an acceptable error of 5, 10 or 20%, the optimal sample size was 253, 63 and 16 plants, respectively, for each 0.3 ha of cultivated field.
Instituto de Patología Vegetal
Fil: Garcete-Gómez, José María. Universidade Federal Rural de Pernambuco. Departamento de Agronomia; Brasil
Fil: Conforto, Erica Cinthia. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentina
Fil: Domínguez-Monge, Santiago. Instituto de Fitosanidad. Colegio de Postgraduados. Fitopatología; México
Fil: Flores-Sánchez, Jorge Luis. Instituto de Fitosanidad. Colegio de Postgraduados. Fitopatología; México
Fil: Mora-Aguilera, Gustavo. Instituto de Fitosanidad. Colegio de Postgraduados. Fitopatología; México
Fil: Michereff, Sami Jorge. Universidade Federal Rural de Pernambuco. Departamento de Agronomia; Brasil
Fuente
European Journal of Plant Pathology 149 : 759-763 (2017)
Materia
Epidemiology
Sampling
Cladodes
Opuntia
Epidemiología
Muestreo
Cladodios
Nopalea Cochenillifera
Prickly Pear
Nivel de accesibilidad
acceso restringido
Condiciones de uso
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/9787
Acceder
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oai_identifier_str oai:localhost:20.500.12123/9787
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spelling Sample size for assessment of cladode brown spot in prickly pear cactusGarcete-Gómez, José MaríaConforto, Erica CinthiaDomínguez-Monge, SantiagoFlores-Sánchez, Jorge LuisMora-Aguilera, GustavoMichereff, Sami JorgeEpidemiologySamplingCladodesOpuntiaEpidemiologíaMuestreoCladodiosNopalea CochenilliferaPrickly PearCladode brown spot (CBS) is an important disease of prickly pear cactus (Nopalea cochenillifera) in Brazil. No standard method exists for sampling in the field. A study was conducted in 30 fields of prickly pear (cv. Miúda) in Pernambuco state, Brazil, to determine the optimal sample size to assess severity of CBS. In each field, a 0.3 ha (45 × 68 m) test area consisting of 30 rows and 45 plants per row (1350 plants per test area) was arbitrarily chosen. In each test area, 50 plants were sampled using a systematic method and the disease severity was assessed with the aid of a standard area diagram set on 2, 4 and 6 cladodes/plant. The spatial pattern of the disease was examined by spatial autocorrelation analysis and the optimal sample sizes were determined based on three levels of error (5, 10 and 20%). CBS severity in the fields ranged from 0.4 to 8.7%. In 15 fields the disease severity of CBS was >4.0% and in 20 fields the spatial pattern of CBS was aggregated. There was a positive correlation (r = 0.59, P = 0.0001) between disease severity and strength of aggregation, and a negative correlation (r = −0.39; P = 0.0001) between disease severity and sample size (number of plants). There was no significant effect (P = 0.3) of the number of cladodes assessed per plant (2, 4 or 6 cladodes) on sample size. Considering a sample of two cladodes per plant and an acceptable error of 5, 10 or 20%, the optimal sample size was 253, 63 and 16 plants, respectively, for each 0.3 ha of cultivated field.Instituto de Patología VegetalFil: Garcete-Gómez, José María. Universidade Federal Rural de Pernambuco. Departamento de Agronomia; BrasilFil: Conforto, Erica Cinthia. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; ArgentinaFil: Domínguez-Monge, Santiago. Instituto de Fitosanidad. Colegio de Postgraduados. Fitopatología; MéxicoFil: Flores-Sánchez, Jorge Luis. Instituto de Fitosanidad. Colegio de Postgraduados. Fitopatología; MéxicoFil: Mora-Aguilera, Gustavo. Instituto de Fitosanidad. Colegio de Postgraduados. Fitopatología; MéxicoFil: Michereff, Sami Jorge. Universidade Federal Rural de Pernambuco. Departamento de Agronomia; BrasilSpringer2021-07-12T17:24:12Z2021-07-12T17:24:12Z2017-03-15info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/9787https://link.springer.com/article/10.1007/s10658-017-1213-x0929-18731573-8469 (online)https://doi.org/10.1007/s10658-017-1213-xEuropean Journal of Plant Pathology 149 : 759-763 (2017)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccess2025-10-16T09:30:09Zoai:localhost:20.500.12123/9787instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-10-16 09:30:09.62INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Sample size for assessment of cladode brown spot in prickly pear cactus
title Sample size for assessment of cladode brown spot in prickly pear cactus
spellingShingle Sample size for assessment of cladode brown spot in prickly pear cactus
Garcete-Gómez, José María
Epidemiology
Sampling
Cladodes
Opuntia
Epidemiología
Muestreo
Cladodios
Nopalea Cochenillifera
Prickly Pear
title_short Sample size for assessment of cladode brown spot in prickly pear cactus
title_full Sample size for assessment of cladode brown spot in prickly pear cactus
title_fullStr Sample size for assessment of cladode brown spot in prickly pear cactus
title_full_unstemmed Sample size for assessment of cladode brown spot in prickly pear cactus
title_sort Sample size for assessment of cladode brown spot in prickly pear cactus
dc.creator.none.fl_str_mv Garcete-Gómez, José María
Conforto, Erica Cinthia
Domínguez-Monge, Santiago
Flores-Sánchez, Jorge Luis
Mora-Aguilera, Gustavo
Michereff, Sami Jorge
author Garcete-Gómez, José María
author_facet Garcete-Gómez, José María
Conforto, Erica Cinthia
Domínguez-Monge, Santiago
Flores-Sánchez, Jorge Luis
Mora-Aguilera, Gustavo
Michereff, Sami Jorge
author_role author
author2 Conforto, Erica Cinthia
Domínguez-Monge, Santiago
Flores-Sánchez, Jorge Luis
Mora-Aguilera, Gustavo
Michereff, Sami Jorge
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Epidemiology
Sampling
Cladodes
Opuntia
Epidemiología
Muestreo
Cladodios
Nopalea Cochenillifera
Prickly Pear
topic Epidemiology
Sampling
Cladodes
Opuntia
Epidemiología
Muestreo
Cladodios
Nopalea Cochenillifera
Prickly Pear
dc.description.none.fl_txt_mv Cladode brown spot (CBS) is an important disease of prickly pear cactus (Nopalea cochenillifera) in Brazil. No standard method exists for sampling in the field. A study was conducted in 30 fields of prickly pear (cv. Miúda) in Pernambuco state, Brazil, to determine the optimal sample size to assess severity of CBS. In each field, a 0.3 ha (45 × 68 m) test area consisting of 30 rows and 45 plants per row (1350 plants per test area) was arbitrarily chosen. In each test area, 50 plants were sampled using a systematic method and the disease severity was assessed with the aid of a standard area diagram set on 2, 4 and 6 cladodes/plant. The spatial pattern of the disease was examined by spatial autocorrelation analysis and the optimal sample sizes were determined based on three levels of error (5, 10 and 20%). CBS severity in the fields ranged from 0.4 to 8.7%. In 15 fields the disease severity of CBS was >4.0% and in 20 fields the spatial pattern of CBS was aggregated. There was a positive correlation (r = 0.59, P = 0.0001) between disease severity and strength of aggregation, and a negative correlation (r = −0.39; P = 0.0001) between disease severity and sample size (number of plants). There was no significant effect (P = 0.3) of the number of cladodes assessed per plant (2, 4 or 6 cladodes) on sample size. Considering a sample of two cladodes per plant and an acceptable error of 5, 10 or 20%, the optimal sample size was 253, 63 and 16 plants, respectively, for each 0.3 ha of cultivated field.
Instituto de Patología Vegetal
Fil: Garcete-Gómez, José María. Universidade Federal Rural de Pernambuco. Departamento de Agronomia; Brasil
Fil: Conforto, Erica Cinthia. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Patología Vegetal; Argentina
Fil: Domínguez-Monge, Santiago. Instituto de Fitosanidad. Colegio de Postgraduados. Fitopatología; México
Fil: Flores-Sánchez, Jorge Luis. Instituto de Fitosanidad. Colegio de Postgraduados. Fitopatología; México
Fil: Mora-Aguilera, Gustavo. Instituto de Fitosanidad. Colegio de Postgraduados. Fitopatología; México
Fil: Michereff, Sami Jorge. Universidade Federal Rural de Pernambuco. Departamento de Agronomia; Brasil
description Cladode brown spot (CBS) is an important disease of prickly pear cactus (Nopalea cochenillifera) in Brazil. No standard method exists for sampling in the field. A study was conducted in 30 fields of prickly pear (cv. Miúda) in Pernambuco state, Brazil, to determine the optimal sample size to assess severity of CBS. In each field, a 0.3 ha (45 × 68 m) test area consisting of 30 rows and 45 plants per row (1350 plants per test area) was arbitrarily chosen. In each test area, 50 plants were sampled using a systematic method and the disease severity was assessed with the aid of a standard area diagram set on 2, 4 and 6 cladodes/plant. The spatial pattern of the disease was examined by spatial autocorrelation analysis and the optimal sample sizes were determined based on three levels of error (5, 10 and 20%). CBS severity in the fields ranged from 0.4 to 8.7%. In 15 fields the disease severity of CBS was >4.0% and in 20 fields the spatial pattern of CBS was aggregated. There was a positive correlation (r = 0.59, P = 0.0001) between disease severity and strength of aggregation, and a negative correlation (r = −0.39; P = 0.0001) between disease severity and sample size (number of plants). There was no significant effect (P = 0.3) of the number of cladodes assessed per plant (2, 4 or 6 cladodes) on sample size. Considering a sample of two cladodes per plant and an acceptable error of 5, 10 or 20%, the optimal sample size was 253, 63 and 16 plants, respectively, for each 0.3 ha of cultivated field.
publishDate 2017
dc.date.none.fl_str_mv 2017-03-15
2021-07-12T17:24:12Z
2021-07-12T17:24:12Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/9787
https://link.springer.com/article/10.1007/s10658-017-1213-x
0929-1873
1573-8469 (online)
https://doi.org/10.1007/s10658-017-1213-x
url http://hdl.handle.net/20.500.12123/9787
https://link.springer.com/article/10.1007/s10658-017-1213-x
https://doi.org/10.1007/s10658-017-1213-x
identifier_str_mv 0929-1873
1573-8469 (online)
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
eu_rights_str_mv restrictedAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv European Journal of Plant Pathology 149 : 759-763 (2017)
reponame:INTA Digital (INTA)
instname:Instituto Nacional de Tecnología Agropecuaria
reponame_str INTA Digital (INTA)
collection INTA Digital (INTA)
instname_str Instituto Nacional de Tecnología Agropecuaria
repository.name.fl_str_mv INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria
repository.mail.fl_str_mv tripaldi.nicolas@inta.gob.ar
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score 12.712165

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