Metarhizium robertsii promotes cotton growth and reduces oviposition of Anthonomus grandis in an ex-planta assay

Autores: Jaimes, Diego Esteban; Ledesma, Carina Mabel; Montenegro, Adolfo; Tcach, Mauricio Alfredo; Nussenbaum, Ana Laura; Turica, Mariana Daniela; Maskin, Laura; Posadas, Julieta Beatriz; Berretta, Marcelo Facundo
Año de publicación: 2026
Idioma: inglés
Tipo de recurso: documento de conferencia
Estado: versión publicada
Descripción: Póster y resumen
Endophytic entomopathogenic fungi (EEPF) can promote plant growth and negatively affect herbivorous insect pests when in planta. This dual role of EEPF has not been previously reported for Metarhizium in cotton. The aim of this study was to investigate the effect of two local isolates of Metarhizium robertsii on the growth of cotton plants and the oviposition of Anthonomus grandis on squares infiltrated with the fungus. Cotton seeds were soaked in conidial suspensions and planted in 20 L pots maintained under the ambient environmental conditions of Chaco province. Several growth parameters were measured regularly over a 60-day period. Compared to the control, treatments with isolates M. robertsii INTA06 and INTA51 significantly increased the fresh mass of above- and below-ground parts of cotton plants by the end of the vegetative stage, with strain INTA51 producing a greater stimulatory effect. For use in oviposition assays, cotton squares were excised from greenhouse-grown plants and incubated with their pedicels immersed in conidial suspensions. After 48 h, one gravid female was placed in each square for 24 h; feeding and oviposition punctures were recorded. No differences were observed in feeding; however, oviposition was drastically reduced on squares treated with both fungal strains.
Instituto de Microbiología y Zoología Agrícola (IMYZA)
Fil: Jaimes, Diego Esteban. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Sáenz Peña; Argentina
Fil: Ledesma, Carina Mabel. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola (IMyZA); Argentina
Fil: Montenegro, Adolfo A. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Sáenz Peña; Argentina
Fil: Tcach, Mauricio Alfredo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Sáenz Peña; Argentina
Fil: Nussenbaum, Ana Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; Argentina
Fil: Nussenbaum, Ana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Turica, Mariana Daniela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; Argentina
Fil: Maskin, Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; Argentina
Fil: Posadas, Julieta Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola (IMyZA); Argentina
Fil: Berretta, Marcelo Facundo. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola (IMyZA); Argentina
Fil: Berretta, Marcelo Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fuente: 2026 International Congress on Invertebrate Pathology and Microbial Control. 58th Annual Meeting of the Society for Invertebrate Pathology. 20th meeting of the IOBC-WPRS Working Group “Microbial and Nematode Control of Invertebrate Pests”. s-Hertogenbosch, the Netherlands, 2 al 6 de agosto del 2026
Materia: Hongos
Control Biológico
Insectos
Plagas
Algodón
Fisiología Vegetal
Fungi
Biological Control
Insects
Pests
Cotton
Plant Physiology
Anthonomus grandis
Metarhizium robertsii
Nivel de accesibilidad: acceso restringido
Condiciones de uso: http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
Institución: Instituto Nacional de Tecnología Agropecuaria
OAI Identificador: oai:localhost:20.500.12123/27638

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spelling	Metarhizium robertsii promotes cotton growth and reduces oviposition of Anthonomus grandis in an ex-planta assayJaimes, Diego EstebanLedesma, Carina MabelMontenegro, AdolfoTcach, Mauricio AlfredoNussenbaum, Ana LauraTurica, Mariana DanielaMaskin, LauraPosadas, Julieta BeatrizBerretta, Marcelo FacundoHongosControl BiológicoInsectosPlagasAlgodónFisiología VegetalFungiBiological ControlInsectsPestsCottonPlant PhysiologyAnthonomus grandisMetarhizium robertsiiPóster y resumenEndophytic entomopathogenic fungi (EEPF) can promote plant growth and negatively affect herbivorous insect pests when in planta. This dual role of EEPF has not been previously reported for Metarhizium in cotton. The aim of this study was to investigate the effect of two local isolates of Metarhizium robertsii on the growth of cotton plants and the oviposition of Anthonomus grandis on squares infiltrated with the fungus. Cotton seeds were soaked in conidial suspensions and planted in 20 L pots maintained under the ambient environmental conditions of Chaco province. Several growth parameters were measured regularly over a 60-day period. Compared to the control, treatments with isolates M. robertsii INTA06 and INTA51 significantly increased the fresh mass of above- and below-ground parts of cotton plants by the end of the vegetative stage, with strain INTA51 producing a greater stimulatory effect. For use in oviposition assays, cotton squares were excised from greenhouse-grown plants and incubated with their pedicels immersed in conidial suspensions. After 48 h, one gravid female was placed in each square for 24 h; feeding and oviposition punctures were recorded. No differences were observed in feeding; however, oviposition was drastically reduced on squares treated with both fungal strains.Instituto de Microbiología y Zoología Agrícola (IMYZA)Fil: Jaimes, Diego Esteban. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Sáenz Peña; ArgentinaFil: Ledesma, Carina Mabel. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola (IMyZA); ArgentinaFil: Montenegro, Adolfo A. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Sáenz Peña; ArgentinaFil: Tcach, Mauricio Alfredo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Sáenz Peña; ArgentinaFil: Nussenbaum, Ana Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; ArgentinaFil: Nussenbaum, Ana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Turica, Mariana Daniela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; ArgentinaFil: Maskin, Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; ArgentinaFil: Posadas, Julieta Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola (IMyZA); ArgentinaFil: Berretta, Marcelo Facundo. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola (IMyZA); ArgentinaFil: Berretta, Marcelo Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaSociety for Invertebrate Pathology - IOBC-WPRS Working Group2026-09-03T10:28:54Z2026-09-03T10:28:54Z2026-08-02info:eu-repo/semantics/conferenceObjectinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfhttp://hdl.handle.net/20.500.12123/276382026 International Congress on Invertebrate Pathology and Microbial Control. 58th Annual Meeting of the Society for Invertebrate Pathology. 20th meeting of the IOBC-WPRS Working Group “Microbial and Nematode Control of Invertebrate Pests”. s-Hertogenbosch, the Netherlands, 2 al 6 de agosto del 2026reponame: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)2026-09-24T11:43:45Zoai:localhost:20.500.12123/27638instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2026-09-24 11:43:46.916INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv	Metarhizium robertsii promotes cotton growth and reduces oviposition of Anthonomus grandis in an ex-planta assay
title	Metarhizium robertsii promotes cotton growth and reduces oviposition of Anthonomus grandis in an ex-planta assay
spellingShingle	Metarhizium robertsii promotes cotton growth and reduces oviposition of Anthonomus grandis in an ex-planta assay Jaimes, Diego Esteban Hongos Control Biológico Insectos Plagas Algodón Fisiología Vegetal Fungi Biological Control Insects Pests Cotton Plant Physiology Anthonomus grandis Metarhizium robertsii
title_short	Metarhizium robertsii promotes cotton growth and reduces oviposition of Anthonomus grandis in an ex-planta assay
title_full	Metarhizium robertsii promotes cotton growth and reduces oviposition of Anthonomus grandis in an ex-planta assay
title_fullStr	Metarhizium robertsii promotes cotton growth and reduces oviposition of Anthonomus grandis in an ex-planta assay
title_full_unstemmed	Metarhizium robertsii promotes cotton growth and reduces oviposition of Anthonomus grandis in an ex-planta assay
title_sort	Metarhizium robertsii promotes cotton growth and reduces oviposition of Anthonomus grandis in an ex-planta assay
dc.creator.none.fl_str_mv	Jaimes, Diego Esteban Ledesma, Carina Mabel Montenegro, Adolfo Tcach, Mauricio Alfredo Nussenbaum, Ana Laura Turica, Mariana Daniela Maskin, Laura Posadas, Julieta Beatriz Berretta, Marcelo Facundo
author	Jaimes, Diego Esteban
author_facet	Jaimes, Diego Esteban Ledesma, Carina Mabel Montenegro, Adolfo Tcach, Mauricio Alfredo Nussenbaum, Ana Laura Turica, Mariana Daniela Maskin, Laura Posadas, Julieta Beatriz Berretta, Marcelo Facundo
author_role	author
author2	Ledesma, Carina Mabel Montenegro, Adolfo Tcach, Mauricio Alfredo Nussenbaum, Ana Laura Turica, Mariana Daniela Maskin, Laura Posadas, Julieta Beatriz Berretta, Marcelo Facundo
author2_role	author author author author author author author author
dc.subject.none.fl_str_mv	Hongos Control Biológico Insectos Plagas Algodón Fisiología Vegetal Fungi Biological Control Insects Pests Cotton Plant Physiology Anthonomus grandis Metarhizium robertsii
topic	Hongos Control Biológico Insectos Plagas Algodón Fisiología Vegetal Fungi Biological Control Insects Pests Cotton Plant Physiology Anthonomus grandis Metarhizium robertsii
dc.description.none.fl_txt_mv	Póster y resumen Endophytic entomopathogenic fungi (EEPF) can promote plant growth and negatively affect herbivorous insect pests when in planta. This dual role of EEPF has not been previously reported for Metarhizium in cotton. The aim of this study was to investigate the effect of two local isolates of Metarhizium robertsii on the growth of cotton plants and the oviposition of Anthonomus grandis on squares infiltrated with the fungus. Cotton seeds were soaked in conidial suspensions and planted in 20 L pots maintained under the ambient environmental conditions of Chaco province. Several growth parameters were measured regularly over a 60-day period. Compared to the control, treatments with isolates M. robertsii INTA06 and INTA51 significantly increased the fresh mass of above- and below-ground parts of cotton plants by the end of the vegetative stage, with strain INTA51 producing a greater stimulatory effect. For use in oviposition assays, cotton squares were excised from greenhouse-grown plants and incubated with their pedicels immersed in conidial suspensions. After 48 h, one gravid female was placed in each square for 24 h; feeding and oviposition punctures were recorded. No differences were observed in feeding; however, oviposition was drastically reduced on squares treated with both fungal strains. Instituto de Microbiología y Zoología Agrícola (IMYZA) Fil: Jaimes, Diego Esteban. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Sáenz Peña; Argentina Fil: Ledesma, Carina Mabel. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola (IMyZA); Argentina Fil: Montenegro, Adolfo A. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Sáenz Peña; Argentina Fil: Tcach, Mauricio Alfredo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Sáenz Peña; Argentina Fil: Nussenbaum, Ana Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; Argentina Fil: Nussenbaum, Ana Laura. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Turica, Mariana Daniela. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; Argentina Fil: Maskin, Laura. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Genética; Argentina Fil: Posadas, Julieta Beatriz. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola (IMyZA); Argentina Fil: Berretta, Marcelo Facundo. Instituto Nacional de Tecnología Agropecuaria (INTA). Instituto de Microbiología y Zoología Agrícola (IMyZA); Argentina Fil: Berretta, Marcelo Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description	Póster y resumen
publishDate	2026
dc.date.none.fl_str_mv	2026-09-03T10:28:54Z 2026-09-03T10:28:54Z 2026-08-02
dc.type.none.fl_str_mv	info:eu-repo/semantics/conferenceObject info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_5794 info:ar-repo/semantics/documentoDeConferencia
format	conferenceObject
status_str	publishedVersion
dc.identifier.none.fl_str_mv	http://hdl.handle.net/20.500.12123/27638
url	http://hdl.handle.net/20.500.12123/27638
dc.language.none.fl_str_mv	eng
language	eng
dc.rights.none.fl_str_mv	info:eu-repo/semantics/restrictedAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ 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	Society for Invertebrate Pathology - IOBC-WPRS Working Group
publisher.none.fl_str_mv	Society for Invertebrate Pathology - IOBC-WPRS Working Group
dc.source.none.fl_str_mv	2026 International Congress on Invertebrate Pathology and Microbial Control. 58th Annual Meeting of the Society for Invertebrate Pathology. 20th meeting of the IOBC-WPRS Working Group “Microbial and Nematode Control of Invertebrate Pests”. s-Hertogenbosch, the Netherlands, 2 al 6 de agosto del 2026 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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Metarhizium robertsii promotes cotton growth and reduces oviposition of Anthonomus grandis in an ex-planta assay

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