Metamitron application could replace carbaryl treatment for chemical thinning in 'Red Delicious' apple

Autores
Curetti, Mariela; Raffo Benegas, Maria Dolores
Año de publicación
2022
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Trabajo presentado al XII International Symposium on Integrating Canopy, Rootstock and Environmental Physiology in Orchard Systems. Wenatchee, Washington (Estados Unidos), julio de 2021
Carbaryl is Argentina’s most used thinning compound for ‘Red Delicious’ apple. Due to environmental concerns about its application, there is a need to find alternatives for chemical thinning. The objective of this work was to evaluate the thinning efficacy of diverse strategies of Brevis® (15% metamitron) applications in the apple ‘Red Delicious’. Experiments were conducted in a commercial apple orchard of ‘Red Delicious’ located in Rio Negro (Argentina) during four seasons (2014-2018). One or two applications with metamitron (MM) were made when central fruit in the clusters were 8-10 mm and 12-14 mm in diameter. First, MM was evaluated at three concentrations (165, 248, and 330 mg L‑1). Secondly, single applications (165 and 248 mg L‑1) and double applications (82.5 and 124 mg L‑1) were tested. All treatments were compared with untreated control and carbaryl application at 1200 mg L‑1. Spraying volume was 2000 L ha‑1 in all treatments. Fruit set, yield, fruit size, maturity indexes, phytotoxicity symptoms, and return bloom were assessed. Under trial conditions, all MM treatments significantly reduced crop load, fruit set, and the number of fruits per tree. In some seasons, the highest MM concentrations (248 and 330 mg L‑1) generated an excessive thinning effect. On the other hand, carbaryl treatment was sometimes ineffective. Double applications increased the thinning efficiency but did not always promote fruit size at harvest. MM treatments only generated slight chlorosis of the leaves and did not negatively affect fruit size and bloom return. Thinning treatments did not affect maturity indices. Therefore, a single treatment with MM at 165 mg L‑1 (±Brevis® 2.2 kg ha‑1) with 8-10 mm fruit diameter is recommended for chemical thinning of ‘ Red Delicious’ and can be as effective as carbaryl application.
EEA Alto Valle
Fil: Curetti, Mariela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; Argentina
Fil: Raffo Benegas, María Dolores. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; Argentina
Fuente
Acta Horticulturae 1346 : 489-495 (September 2022)
Materia
Apples
Pest Control
Metamitron
Chemical Fruit Thinning
Manzana
Malus
Control de Plagas
Metamitrona
Aclareo Químico del Fruto
Malus doméstica
Raleo Químico
Retorno de la Floración
Chemical Thinning
Bloom Return
Nivel de accesibilidad
acceso restringido
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
INTA Digital (INTA)
Institución
Instituto Nacional de Tecnología Agropecuaria
OAI Identificador
oai:localhost:20.500.12123/23881

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spelling Metamitron application could replace carbaryl treatment for chemical thinning in 'Red Delicious' appleCuretti, MarielaRaffo Benegas, Maria DoloresApplesPest ControlMetamitronChemical Fruit ThinningManzanaMalusControl de PlagasMetamitronaAclareo Químico del FrutoMalus domésticaRaleo QuímicoRetorno de la FloraciónChemical ThinningBloom ReturnTrabajo presentado al XII International Symposium on Integrating Canopy, Rootstock and Environmental Physiology in Orchard Systems. Wenatchee, Washington (Estados Unidos), julio de 2021Carbaryl is Argentina’s most used thinning compound for ‘Red Delicious’ apple. Due to environmental concerns about its application, there is a need to find alternatives for chemical thinning. The objective of this work was to evaluate the thinning efficacy of diverse strategies of Brevis® (15% metamitron) applications in the apple ‘Red Delicious’. Experiments were conducted in a commercial apple orchard of ‘Red Delicious’ located in Rio Negro (Argentina) during four seasons (2014-2018). One or two applications with metamitron (MM) were made when central fruit in the clusters were 8-10 mm and 12-14 mm in diameter. First, MM was evaluated at three concentrations (165, 248, and 330 mg L‑1). Secondly, single applications (165 and 248 mg L‑1) and double applications (82.5 and 124 mg L‑1) were tested. All treatments were compared with untreated control and carbaryl application at 1200 mg L‑1. Spraying volume was 2000 L ha‑1 in all treatments. Fruit set, yield, fruit size, maturity indexes, phytotoxicity symptoms, and return bloom were assessed. Under trial conditions, all MM treatments significantly reduced crop load, fruit set, and the number of fruits per tree. In some seasons, the highest MM concentrations (248 and 330 mg L‑1) generated an excessive thinning effect. On the other hand, carbaryl treatment was sometimes ineffective. Double applications increased the thinning efficiency but did not always promote fruit size at harvest. MM treatments only generated slight chlorosis of the leaves and did not negatively affect fruit size and bloom return. Thinning treatments did not affect maturity indices. Therefore, a single treatment with MM at 165 mg L‑1 (±Brevis® 2.2 kg ha‑1) with 8-10 mm fruit diameter is recommended for chemical thinning of ‘ Red Delicious’ and can be as effective as carbaryl application.EEA Alto ValleFil: Curetti, Mariela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; ArgentinaFil: Raffo Benegas, María Dolores. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; ArgentinaISHS2025-09-22T12:21:40Z2025-09-22T12:21:40Z2022-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/23881https://www.actahort.org/books/1346/1346_62.htm978-94-62613-45-40567-7572 (Print)2406-6168 (Electronic)https://doi.org/10.17660/ActaHortic.2022.1346.62Acta Horticulturae 1346 : 489-495 (September 2022)reponame:INTA Digital (INTA)instname:Instituto Nacional de Tecnología Agropecuariaenginfo:eu-repo/semantics/restrictedAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)2025-09-29T13:47:31Zoai:localhost:20.500.12123/23881instacron: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 13:47:32.253INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Metamitron application could replace carbaryl treatment for chemical thinning in 'Red Delicious' apple
title Metamitron application could replace carbaryl treatment for chemical thinning in 'Red Delicious' apple
spellingShingle Metamitron application could replace carbaryl treatment for chemical thinning in 'Red Delicious' apple
Curetti, Mariela
Apples
Pest Control
Metamitron
Chemical Fruit Thinning
Manzana
Malus
Control de Plagas
Metamitrona
Aclareo Químico del Fruto
Malus doméstica
Raleo Químico
Retorno de la Floración
Chemical Thinning
Bloom Return
title_short Metamitron application could replace carbaryl treatment for chemical thinning in 'Red Delicious' apple
title_full Metamitron application could replace carbaryl treatment for chemical thinning in 'Red Delicious' apple
title_fullStr Metamitron application could replace carbaryl treatment for chemical thinning in 'Red Delicious' apple
title_full_unstemmed Metamitron application could replace carbaryl treatment for chemical thinning in 'Red Delicious' apple
title_sort Metamitron application could replace carbaryl treatment for chemical thinning in 'Red Delicious' apple
dc.creator.none.fl_str_mv Curetti, Mariela
Raffo Benegas, Maria Dolores
author Curetti, Mariela
author_facet Curetti, Mariela
Raffo Benegas, Maria Dolores
author_role author
author2 Raffo Benegas, Maria Dolores
author2_role author
dc.subject.none.fl_str_mv Apples
Pest Control
Metamitron
Chemical Fruit Thinning
Manzana
Malus
Control de Plagas
Metamitrona
Aclareo Químico del Fruto
Malus doméstica
Raleo Químico
Retorno de la Floración
Chemical Thinning
Bloom Return
topic Apples
Pest Control
Metamitron
Chemical Fruit Thinning
Manzana
Malus
Control de Plagas
Metamitrona
Aclareo Químico del Fruto
Malus doméstica
Raleo Químico
Retorno de la Floración
Chemical Thinning
Bloom Return
dc.description.none.fl_txt_mv Trabajo presentado al XII International Symposium on Integrating Canopy, Rootstock and Environmental Physiology in Orchard Systems. Wenatchee, Washington (Estados Unidos), julio de 2021
Carbaryl is Argentina’s most used thinning compound for ‘Red Delicious’ apple. Due to environmental concerns about its application, there is a need to find alternatives for chemical thinning. The objective of this work was to evaluate the thinning efficacy of diverse strategies of Brevis® (15% metamitron) applications in the apple ‘Red Delicious’. Experiments were conducted in a commercial apple orchard of ‘Red Delicious’ located in Rio Negro (Argentina) during four seasons (2014-2018). One or two applications with metamitron (MM) were made when central fruit in the clusters were 8-10 mm and 12-14 mm in diameter. First, MM was evaluated at three concentrations (165, 248, and 330 mg L‑1). Secondly, single applications (165 and 248 mg L‑1) and double applications (82.5 and 124 mg L‑1) were tested. All treatments were compared with untreated control and carbaryl application at 1200 mg L‑1. Spraying volume was 2000 L ha‑1 in all treatments. Fruit set, yield, fruit size, maturity indexes, phytotoxicity symptoms, and return bloom were assessed. Under trial conditions, all MM treatments significantly reduced crop load, fruit set, and the number of fruits per tree. In some seasons, the highest MM concentrations (248 and 330 mg L‑1) generated an excessive thinning effect. On the other hand, carbaryl treatment was sometimes ineffective. Double applications increased the thinning efficiency but did not always promote fruit size at harvest. MM treatments only generated slight chlorosis of the leaves and did not negatively affect fruit size and bloom return. Thinning treatments did not affect maturity indices. Therefore, a single treatment with MM at 165 mg L‑1 (±Brevis® 2.2 kg ha‑1) with 8-10 mm fruit diameter is recommended for chemical thinning of ‘ Red Delicious’ and can be as effective as carbaryl application.
EEA Alto Valle
Fil: Curetti, Mariela. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; Argentina
Fil: Raffo Benegas, María Dolores. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Alto Valle; Argentina
description Trabajo presentado al XII International Symposium on Integrating Canopy, Rootstock and Environmental Physiology in Orchard Systems. Wenatchee, Washington (Estados Unidos), julio de 2021
publishDate 2022
dc.date.none.fl_str_mv 2022-09
2025-09-22T12:21:40Z
2025-09-22T12:21:40Z
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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info:ar-repo/semantics/articulo
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status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/20.500.12123/23881
https://www.actahort.org/books/1346/1346_62.htm
978-94-62613-45-4
0567-7572 (Print)
2406-6168 (Electronic)
https://doi.org/10.17660/ActaHortic.2022.1346.62
url http://hdl.handle.net/20.500.12123/23881
https://www.actahort.org/books/1346/1346_62.htm
https://doi.org/10.17660/ActaHortic.2022.1346.62
identifier_str_mv 978-94-62613-45-4
0567-7572 (Print)
2406-6168 (Electronic)
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/restrictedAccess
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Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv restrictedAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ISHS
publisher.none.fl_str_mv ISHS
dc.source.none.fl_str_mv Acta Horticulturae 1346 : 489-495 (September 2022)
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
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