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
- Institución
- Instituto Nacional de Tecnología Agropecuaria
- OAI Identificador
- oai:localhost:20.500.12123/9787
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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/restrictedAccess2025-09-29T13:45:16Zoai: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:l2025-09-29 13:45:16.941INTA 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 |
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INTA Digital (INTA) |
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INTA Digital (INTA) |
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Instituto Nacional de Tecnología Agropecuaria |
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INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuaria |
repository.mail.fl_str_mv |
tripaldi.nicolas@inta.gob.ar |
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12.559606 |