Reproductive strategy of overwintering Dalbulus maidis (Hemiptera: Cicadellidae) in subtropical areas: neither temperature nor photoperiod, only corn triggers oviposition

Autores
Van Nieuwenhove, Guido Alejandro; Bezdjian, Laura Patricia; Van Nieuwenhove, Carina Paola; Coll Aráoz, María Victoria; Casuso, Violeta Macarena; Virla, Eduardo Gabriel
Año de publicación
2025
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
BACKGROUND: The corn leafhopper Dalbulus maidis, a key vector of corn stunt disease, poses a major threat to corn production across the Americas. In subtropical South America, females overwinter as active adults despite the absence of host plants. This study explored, for the first time, the reproductive status and adaptive strategies of D. maidis females overwintering in Tucumán, Argentina. RESULTS: In field, seasonal polyphenism was evident, with melanized females predominating in winter, likely enhancing cold tolerance. Females survive winter with inactive but fertilized ovaries, indicating a state of reproductive quiescence. Ovarian activation and egg-laying are triggered by host plant availability rather than environmental cues such as temperature or photoperiod. Nonetheless, temperature and photoperiod significantly influence the polyphenism of first-generation offspring – longer days and higher temperatures yield larger, lighter individuals, while colder, shorter days produce smaller, darker ones. Additionally, oviposition occurs almost exclusively during daylight hours. CONCLUSION: The observed female-biased sex ratio and polyphenic variations suggest a combination of physiological and behavioral adaptations for winter survival. In overwintering females of the vector, access to corn plants is the key trigger for ovarian activation and the initiation of egg-laying. Despite not quantifying sperm load, overwintered females maintained > 80% fertility for over 2 weeks without male presence once corn was accessible. These findings underscore the importance of managing volunteer corn and standardizing early sowing to mitigate early infestations and economic losses due to D. maidis outbreaks in late-planted corn fields.
EEA Las Breñas
Fil: Van Nieuwenhove, Guido A. Fundación Miguel Lillo. Instituto de Entomología; Argentina
Fil: Van Nieuwenhove, Guido A. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT NOA Sur; Argentina
Fil: Bezdjian, Laura P. Fundación Miguel Lillo. Instituto de Entomología; Argentina
Fil: Van Nieuwenhove, Carina Paola. Fundación Miguel Lillo. Instituto de Morfología Animal; Argentina
Fil: Van Nieuwenhove, Carina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos. Laboratorio de Ecofisiología Tecnológica; Argentina
Fil: Coll Aráoz, María V. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e IML; Argentina
Fil: Casuso, Violeta Macarena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Las Breñas; Argentina
Fil: Virla, Eduardo Gabriel. Fundación Miguel Lillo. Instituto de Entomología; Argentina
Fil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT NOA Sur; Argentina
Fuente
Pest Management Science : 1-11 (First published: 12 September 2025)
Materia
Dalbulus maidis
Plant Pests
Overwintering
Polyphenism
Reproductive Behaviour
Oviposition
Plagas de Plantas
Invernación
Polifenismo
Comportamiento Reproductivo
Oviposición
Argentina
Chicharrita del Maíz
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:20.500.12123/24199
Acceder
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oai_identifier_str oai:localhost:20.500.12123/24199
network_acronym_str INTADig
repository_id_str l
network_name_str INTA Digital (INTA)
spelling Reproductive strategy of overwintering Dalbulus maidis (Hemiptera: Cicadellidae) in subtropical areas: neither temperature nor photoperiod, only corn triggers ovipositionVan Nieuwenhove, Guido AlejandroBezdjian, Laura PatriciaVan Nieuwenhove, Carina PaolaColl Aráoz, María VictoriaCasuso, Violeta MacarenaVirla, Eduardo GabrielDalbulus maidisPlant PestsOverwinteringPolyphenismReproductive BehaviourOvipositionPlagas de PlantasInvernaciónPolifenismoComportamiento ReproductivoOviposiciónArgentinaChicharrita del MaízBACKGROUND: The corn leafhopper Dalbulus maidis, a key vector of corn stunt disease, poses a major threat to corn production across the Americas. In subtropical South America, females overwinter as active adults despite the absence of host plants. This study explored, for the first time, the reproductive status and adaptive strategies of D. maidis females overwintering in Tucumán, Argentina. RESULTS: In field, seasonal polyphenism was evident, with melanized females predominating in winter, likely enhancing cold tolerance. Females survive winter with inactive but fertilized ovaries, indicating a state of reproductive quiescence. Ovarian activation and egg-laying are triggered by host plant availability rather than environmental cues such as temperature or photoperiod. Nonetheless, temperature and photoperiod significantly influence the polyphenism of first-generation offspring – longer days and higher temperatures yield larger, lighter individuals, while colder, shorter days produce smaller, darker ones. Additionally, oviposition occurs almost exclusively during daylight hours. CONCLUSION: The observed female-biased sex ratio and polyphenic variations suggest a combination of physiological and behavioral adaptations for winter survival. In overwintering females of the vector, access to corn plants is the key trigger for ovarian activation and the initiation of egg-laying. Despite not quantifying sperm load, overwintered females maintained > 80% fertility for over 2 weeks without male presence once corn was accessible. These findings underscore the importance of managing volunteer corn and standardizing early sowing to mitigate early infestations and economic losses due to D. maidis outbreaks in late-planted corn fields.EEA Las BreñasFil: Van Nieuwenhove, Guido A. Fundación Miguel Lillo. Instituto de Entomología; ArgentinaFil: Van Nieuwenhove, Guido A. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT NOA Sur; ArgentinaFil: Bezdjian, Laura P. Fundación Miguel Lillo. Instituto de Entomología; ArgentinaFil: Van Nieuwenhove, Carina Paola. Fundación Miguel Lillo. Instituto de Morfología Animal; ArgentinaFil: Van Nieuwenhove, Carina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos. Laboratorio de Ecofisiología Tecnológica; ArgentinaFil: Coll Aráoz, María V. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e IML; ArgentinaFil: Casuso, Violeta Macarena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Las Breñas; ArgentinaFil: Virla, Eduardo Gabriel. Fundación Miguel Lillo. Instituto de Entomología; ArgentinaFil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT NOA Sur; ArgentinaWiley2025-10-17T12:17:36Z2025-10-17T12:17:36Z2025-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://hdl.handle.net/20.500.12123/24199https://scijournals.onlinelibrary.wiley.com/doi/10.1002/ps.702271526-498X1526-4998https://doi.org/10.1002/ps.70227Pest Management Science : 1-11 (First published: 12 September 2025)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)2025-10-23T11:19:47Zoai:localhost:20.500.12123/24199instacron:INTAInstitucionalhttp://repositorio.inta.gob.ar/Organismo científico-tecnológicoNo correspondehttp://repositorio.inta.gob.ar/oai/requesttripaldi.nicolas@inta.gob.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:l2025-10-23 11:19:47.917INTA Digital (INTA) - Instituto Nacional de Tecnología Agropecuariafalse
dc.title.none.fl_str_mv Reproductive strategy of overwintering Dalbulus maidis (Hemiptera: Cicadellidae) in subtropical areas: neither temperature nor photoperiod, only corn triggers oviposition
title Reproductive strategy of overwintering Dalbulus maidis (Hemiptera: Cicadellidae) in subtropical areas: neither temperature nor photoperiod, only corn triggers oviposition
spellingShingle Reproductive strategy of overwintering Dalbulus maidis (Hemiptera: Cicadellidae) in subtropical areas: neither temperature nor photoperiod, only corn triggers oviposition
Van Nieuwenhove, Guido Alejandro
Dalbulus maidis
Plant Pests
Overwintering
Polyphenism
Reproductive Behaviour
Oviposition
Plagas de Plantas
Invernación
Polifenismo
Comportamiento Reproductivo
Oviposición
Argentina
Chicharrita del Maíz
title_short Reproductive strategy of overwintering Dalbulus maidis (Hemiptera: Cicadellidae) in subtropical areas: neither temperature nor photoperiod, only corn triggers oviposition
title_full Reproductive strategy of overwintering Dalbulus maidis (Hemiptera: Cicadellidae) in subtropical areas: neither temperature nor photoperiod, only corn triggers oviposition
title_fullStr Reproductive strategy of overwintering Dalbulus maidis (Hemiptera: Cicadellidae) in subtropical areas: neither temperature nor photoperiod, only corn triggers oviposition
title_full_unstemmed Reproductive strategy of overwintering Dalbulus maidis (Hemiptera: Cicadellidae) in subtropical areas: neither temperature nor photoperiod, only corn triggers oviposition
title_sort Reproductive strategy of overwintering Dalbulus maidis (Hemiptera: Cicadellidae) in subtropical areas: neither temperature nor photoperiod, only corn triggers oviposition
dc.creator.none.fl_str_mv Van Nieuwenhove, Guido Alejandro
Bezdjian, Laura Patricia
Van Nieuwenhove, Carina Paola
Coll Aráoz, María Victoria
Casuso, Violeta Macarena
Virla, Eduardo Gabriel
author Van Nieuwenhove, Guido Alejandro
author_facet Van Nieuwenhove, Guido Alejandro
Bezdjian, Laura Patricia
Van Nieuwenhove, Carina Paola
Coll Aráoz, María Victoria
Casuso, Violeta Macarena
Virla, Eduardo Gabriel
author_role author
author2 Bezdjian, Laura Patricia
Van Nieuwenhove, Carina Paola
Coll Aráoz, María Victoria
Casuso, Violeta Macarena
Virla, Eduardo Gabriel
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Dalbulus maidis
Plant Pests
Overwintering
Polyphenism
Reproductive Behaviour
Oviposition
Plagas de Plantas
Invernación
Polifenismo
Comportamiento Reproductivo
Oviposición
Argentina
Chicharrita del Maíz
topic Dalbulus maidis
Plant Pests
Overwintering
Polyphenism
Reproductive Behaviour
Oviposition
Plagas de Plantas
Invernación
Polifenismo
Comportamiento Reproductivo
Oviposición
Argentina
Chicharrita del Maíz
dc.description.none.fl_txt_mv BACKGROUND: The corn leafhopper Dalbulus maidis, a key vector of corn stunt disease, poses a major threat to corn production across the Americas. In subtropical South America, females overwinter as active adults despite the absence of host plants. This study explored, for the first time, the reproductive status and adaptive strategies of D. maidis females overwintering in Tucumán, Argentina. RESULTS: In field, seasonal polyphenism was evident, with melanized females predominating in winter, likely enhancing cold tolerance. Females survive winter with inactive but fertilized ovaries, indicating a state of reproductive quiescence. Ovarian activation and egg-laying are triggered by host plant availability rather than environmental cues such as temperature or photoperiod. Nonetheless, temperature and photoperiod significantly influence the polyphenism of first-generation offspring – longer days and higher temperatures yield larger, lighter individuals, while colder, shorter days produce smaller, darker ones. Additionally, oviposition occurs almost exclusively during daylight hours. CONCLUSION: The observed female-biased sex ratio and polyphenic variations suggest a combination of physiological and behavioral adaptations for winter survival. In overwintering females of the vector, access to corn plants is the key trigger for ovarian activation and the initiation of egg-laying. Despite not quantifying sperm load, overwintered females maintained > 80% fertility for over 2 weeks without male presence once corn was accessible. These findings underscore the importance of managing volunteer corn and standardizing early sowing to mitigate early infestations and economic losses due to D. maidis outbreaks in late-planted corn fields.
EEA Las Breñas
Fil: Van Nieuwenhove, Guido A. Fundación Miguel Lillo. Instituto de Entomología; Argentina
Fil: Van Nieuwenhove, Guido A. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT NOA Sur; Argentina
Fil: Bezdjian, Laura P. Fundación Miguel Lillo. Instituto de Entomología; Argentina
Fil: Van Nieuwenhove, Carina Paola. Fundación Miguel Lillo. Instituto de Morfología Animal; Argentina
Fil: Van Nieuwenhove, Carina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Centro de Referencia para Lactobacilos. Laboratorio de Ecofisiología Tecnológica; Argentina
Fil: Coll Aráoz, María V. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e IML; Argentina
Fil: Casuso, Violeta Macarena. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Las Breñas; Argentina
Fil: Virla, Eduardo Gabriel. Fundación Miguel Lillo. Instituto de Entomología; Argentina
Fil: Virla, Eduardo Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. CCT NOA Sur; Argentina
description BACKGROUND: The corn leafhopper Dalbulus maidis, a key vector of corn stunt disease, poses a major threat to corn production across the Americas. In subtropical South America, females overwinter as active adults despite the absence of host plants. This study explored, for the first time, the reproductive status and adaptive strategies of D. maidis females overwintering in Tucumán, Argentina. RESULTS: In field, seasonal polyphenism was evident, with melanized females predominating in winter, likely enhancing cold tolerance. Females survive winter with inactive but fertilized ovaries, indicating a state of reproductive quiescence. Ovarian activation and egg-laying are triggered by host plant availability rather than environmental cues such as temperature or photoperiod. Nonetheless, temperature and photoperiod significantly influence the polyphenism of first-generation offspring – longer days and higher temperatures yield larger, lighter individuals, while colder, shorter days produce smaller, darker ones. Additionally, oviposition occurs almost exclusively during daylight hours. CONCLUSION: The observed female-biased sex ratio and polyphenic variations suggest a combination of physiological and behavioral adaptations for winter survival. In overwintering females of the vector, access to corn plants is the key trigger for ovarian activation and the initiation of egg-laying. Despite not quantifying sperm load, overwintered females maintained > 80% fertility for over 2 weeks without male presence once corn was accessible. These findings underscore the importance of managing volunteer corn and standardizing early sowing to mitigate early infestations and economic losses due to D. maidis outbreaks in late-planted corn fields.
publishDate 2025
dc.date.none.fl_str_mv 2025-10-17T12:17:36Z
2025-10-17T12:17:36Z
2025-09
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/20.500.12123/24199
https://scijournals.onlinelibrary.wiley.com/doi/10.1002/ps.70227
1526-498X
1526-4998
https://doi.org/10.1002/ps.70227
url http://hdl.handle.net/20.500.12123/24199
https://scijournals.onlinelibrary.wiley.com/doi/10.1002/ps.70227
https://doi.org/10.1002/ps.70227
identifier_str_mv 1526-498X
1526-4998
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 Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv Pest Management Science : 1-11 (First published: 12 September 2025)
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 12.982451

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