Assessment of biorational insecticides to control thrips colonizing lettuce in greenhouse
Thrips is one of the key lettuce pests that reduce yield and quality by direct damage caused mainly by piercing-sucking feeding and indirect damage by virus transmission. Conventional management of thrips is based on a few active ingredients of synthetic insecticides at the risk of generating resist...
| Autores principales: | , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
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Ediciones INTA
2025
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| Acceso en línea: | http://hdl.handle.net/20.500.12123/23491 https://doi.org/10.58149/88j2-v289 |
| _version_ | 1855487140013539328 |
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| author | Diaz, Beatriz Maria Puhl, Laura Elena Castresana, Jorge Eduardo |
| author_browse | Castresana, Jorge Eduardo Diaz, Beatriz Maria Puhl, Laura Elena |
| author_facet | Diaz, Beatriz Maria Puhl, Laura Elena Castresana, Jorge Eduardo |
| author_sort | Diaz, Beatriz Maria |
| collection | INTA Digital |
| description | Thrips is one of the key lettuce pests that reduce yield and quality by direct damage caused mainly by piercing-sucking feeding and indirect damage by virus transmission. Conventional management of thrips is based on a few active ingredients of synthetic insecticides at the risk of generating resistance and environmental disruption. Currently, a new generation of insecticides of botanical origin and other natural derivatives are available on the market. The aim of this study was to evaluate the efficacy of biorational insecticides against thrips and their impact on natural enemies and lettuce production in a greenhouse. The assays were carried out in a greenhouse at INTA Concordia, Argentina during the autumn of 2022 and 2023. Three biorational insecticides were tested by contact: the positive control, azadirachtina (Neemazal® 1,2% EC, 0,4%), potassium oleate (Hydralene® AGK 48% SC, 2%), orange essential oil (OEO 10% SC, 0,3%), and additionally, water was included as a negative control. Applications began when thrips populations reached the economic injury threshold according to lettuce phenology. Thrips population and their natural enemies were inspected weekly on plants and after the first application also on yellow and blue sticky traps. Lettuce yield and losses were evaluated for each treatment at harvest. Neemazal® was the most effective bioinsecticide to reduce thrips infestation (42-53%), followed by Hydralene® (27-37%). No evident effect was obtained with the experimental OEO (0-19%). The reduction of the thrips infestation was directly related to their direct damage and inversely related to the crop losses (5-11%). No significant effects on natural enemies captured by sticky traps were observed, with the exception of ladybugs in the OEO treatment. Mode of action and the possibilities to include bioinsecticides in an IPM program are discussed. |
| format | Artículo |
| id | INTA23491 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2025 |
| publishDateRange | 2025 |
| publishDateSort | 2025 |
| publisher | Ediciones INTA |
| publisherStr | Ediciones INTA |
| record_format | dspace |
| spelling | INTA234912025-08-20T12:44:37Z Assessment of biorational insecticides to control thrips colonizing lettuce in greenhouse Diaz, Beatriz Maria Puhl, Laura Elena Castresana, Jorge Eduardo Plagas de Plantas Invernaderos Lechugas Insecticidas Thrips (género) Bioplaguicidas Plant Pests Greenhouses Lettuces Insecticides Thrips (genus) Biopesticides Thrips is one of the key lettuce pests that reduce yield and quality by direct damage caused mainly by piercing-sucking feeding and indirect damage by virus transmission. Conventional management of thrips is based on a few active ingredients of synthetic insecticides at the risk of generating resistance and environmental disruption. Currently, a new generation of insecticides of botanical origin and other natural derivatives are available on the market. The aim of this study was to evaluate the efficacy of biorational insecticides against thrips and their impact on natural enemies and lettuce production in a greenhouse. The assays were carried out in a greenhouse at INTA Concordia, Argentina during the autumn of 2022 and 2023. Three biorational insecticides were tested by contact: the positive control, azadirachtina (Neemazal® 1,2% EC, 0,4%), potassium oleate (Hydralene® AGK 48% SC, 2%), orange essential oil (OEO 10% SC, 0,3%), and additionally, water was included as a negative control. Applications began when thrips populations reached the economic injury threshold according to lettuce phenology. Thrips population and their natural enemies were inspected weekly on plants and after the first application also on yellow and blue sticky traps. Lettuce yield and losses were evaluated for each treatment at harvest. Neemazal® was the most effective bioinsecticide to reduce thrips infestation (42-53%), followed by Hydralene® (27-37%). No evident effect was obtained with the experimental OEO (0-19%). The reduction of the thrips infestation was directly related to their direct damage and inversely related to the crop losses (5-11%). No significant effects on natural enemies captured by sticky traps were observed, with the exception of ladybugs in the OEO treatment. Mode of action and the possibilities to include bioinsecticides in an IPM program are discussed. Los trips constituyen una de las plagas clave de la lechuga que pueden afectar su rendimiento y calidad por daño directo causado principalmente por su aparato raspador-suctor y daño indirecto por ser transmisores de virus. El manejo convencional de la plaga se basa en el uso de pocos principios activos con el riesgo de generar resistencia y disrupciones ambientales. Una nueva generación de insecticidas de origen botánico y otros derivados naturales están disponibles en el mercado. El objetivo fue evaluar la eficacia de insecticidas biorracionales sobre trips, su impacto sobre sus enemigos naturales y la producción de lechuga en invernadero. Los ensayos se realizaron en un invernadero en INTA Concordia, Argentina durante el otoño de 2022 y 2023. Se evaluaron tres insecticidas biorracionales por contacto: el control positivo, azadirachtina (Neemazal®1,2% EC, 0,4%), oleato de potasio (Hydralene®AGK 48% SC, 2%), aceite esencial de naranja (AEN 10% SC, 0,3%) y agua como control negativo. Las aplicaciones comenzaron cuando la población de trips alcanzó el umbral de daño económico de acuerdo con el estado fenológico de la lechuga. La población de trips y sus enemigos naturales fue monitoreada semanalmente sobre plantas y con trampas pegajosas amarillas y azules. Para cada tratamiento se evaluó el rendimiento y las pérdidas a cosecha. Neemazal® fue el más efectivo para reducir la infestación de trips (42-53%), seguido de Hydralene® (27-37%). No se obtuvo un efecto evidente con el AEN (0-19%). La reducción de la infestación de trips estuvo directamente relacionada con el daño directo e inversamente a las pérdidas a cosecha (5-11%). No se observaron efectos significativos sobre los enemigos naturales sobre trampas pegajosas, a excepción de los coccinélidos en el tratamiento con AEN. Se discute el modo de acción y las posibilidades de incluir bioinsecticidas en un programa de MIP. EEA Concordia Fil: Diaz, Beatriz Maria. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concordia; Argentina Fil: Puhl, Laura. Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Métodos Cuantitativos y Sistemas de Información. Cátedra de Modelos Cuantitativos Aplicados; Argentina Fil: Castresana, Jorge Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Concordia; Argentina. 2025-08-20T12:42:43Z 2025-08-20T12:42:43Z 2025-08 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/23491 0325-8718 1669-2314 https://doi.org/10.58149/88j2-v289 eng info:eu-repograntAgreement/INTA/2019-PE-E1-I009-001, Intensificación sostenible de los sistemas de producción bajo cubierta (hortalizas, flores y ornamentales) info:eu-repograntAgreement/INTA/2023-PE-L01-I053, Generación y difusión de tecnologías para el desarrollo sostenible de los sistemas productivos hortícolas del NEA info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf Ediciones INTA RIA 51 (2) : 106-117. (agosto 2025) |
| spellingShingle | Plagas de Plantas Invernaderos Lechugas Insecticidas Thrips (género) Bioplaguicidas Plant Pests Greenhouses Lettuces Insecticides Thrips (genus) Biopesticides Diaz, Beatriz Maria Puhl, Laura Elena Castresana, Jorge Eduardo Assessment of biorational insecticides to control thrips colonizing lettuce in greenhouse |
| title | Assessment of biorational insecticides to control thrips colonizing lettuce in greenhouse |
| title_full | Assessment of biorational insecticides to control thrips colonizing lettuce in greenhouse |
| title_fullStr | Assessment of biorational insecticides to control thrips colonizing lettuce in greenhouse |
| title_full_unstemmed | Assessment of biorational insecticides to control thrips colonizing lettuce in greenhouse |
| title_short | Assessment of biorational insecticides to control thrips colonizing lettuce in greenhouse |
| title_sort | assessment of biorational insecticides to control thrips colonizing lettuce in greenhouse |
| topic | Plagas de Plantas Invernaderos Lechugas Insecticidas Thrips (género) Bioplaguicidas Plant Pests Greenhouses Lettuces Insecticides Thrips (genus) Biopesticides |
| url | http://hdl.handle.net/20.500.12123/23491 https://doi.org/10.58149/88j2-v289 |
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