Efecto de un insecticida formulado a base de neem (Azadiracha indica) sobre el desarrollo larval de Spodoptera frugiperda (J. E. Smith) en maíz (Zea mays L.) bajo condiciones de laboratorio.
| dc.contributor.advisor | Cedeño Loja, Pedro Emilio | |
| dc.contributor.author | Villamarin Barreiro, Juan Andrés | |
| dc.date.accessioned | 2021-10-20T21:25:40Z | |
| dc.date.available | 2021-10-20T21:25:40Z | |
| dc.date.issued | 2021 | |
| dc.identifier.uri | http://dspace.utb.edu.ec/handle/49000/10266 | |
| dc.description | The fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae), is one of the main pest insects that causes serious damage and losses in yield in corn cultivation in Ecuador. Several chemical products are used for its control, generally harmful to human health and causing serious damage to the different ecosystems of the biosphere. As a friendlier alternative, the effectiveness of several commercial insecticides formulated with biological microorganisms and plant extracts for the biological control of fall armyworm was evaluated in the laboratory. The insecticides evaluated in laboratories against stage 3 larvae were: Beauveria bassiana, Bacillus thuringiensis, Neem oil), as well as a chemical insecticide, as a positive control (Spinetoram). A completely randomized design with evaluations every 24 hours for four days at the same time was used for this research. The most effective product for the control of fall armyworm in relation to mortality after 96 hours of evaluation was: B. thuriguiensis at a low dose of (1.95ml - 0.39L), obtaining a mortality of 100%; followed by Neem at a low dose of (1.95ml - 0.39L) and B. bassiana at an average dose of (3.90ml - 0.7L), obtaining a mortality of 97.5 and as a chemical control Spinetoram, at a low dose of (0.39cc - 0.78L). The most effective products for the control of fall armyworm under laboratory conditions in relation to the time of action at 24 hours of evaluation were: Neem with 17.5% and Spinetoram with 100% mortality rate, while with B thuriguiensis and B. bassiana there was no mortality in the bioassay. The work revealed that it is possible to implement the use of biological and botanical insecticides for the control of S. frugiperda. | es_ES |
| dc.description | The fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae), is one of the main pest insects that causes serious damage and losses in yield in corn cultivation in Ecuador. Several chemical products are used for its control, generally harmful to human health and causing serious damage to the different ecosystems of the biosphere. As a friendlier alternative, the effectiveness of several commercial insecticides formulated with biological microorganisms and plant extracts for the biological control of fall armyworm was evaluated in the laboratory. The insecticides evaluated in laboratories against stage 3 larvae were: Beauveria bassiana, Bacillus thuringiensis, Neem oil), as well as a chemical insecticide, as a positive control (Spinetoram). A completely randomized design with evaluations every 24 hours for four days at the same time was used for this research. The most effective product for the control of fall armyworm in relation to mortality after 96 hours of evaluation was: B. thuriguiensis at a low dose of (1.95ml - 0.39L), obtaining a mortality of 100%; followed by Neem at a low dose of (1.95ml - 0.39L) and B. bassiana at an average dose of (3.90ml - 0.7L), obtaining a mortality of 97.5 and as a chemical control Spinetoram, at a low dose of (0.39cc - 0.78L). The most effective products for the control of fall armyworm under laboratory conditions in relation to the time of action at 24 hours of evaluation were: Neem with 17.5% and Spinetoram with 100% mortality rate, while with B thuriguiensis and B. bassiana there was no mortality in the bioassay. The work revealed that it is possible to implement the use of biological and botanical insecticides for the control of S. frugiperda. | es_ES |
| dc.description.abstract | El gusano cogollero Spodoptera frugiperda (Lepidóptera: Noctuidae), es una de los principales insectos plagas que causa graves daños y pérdidas en el rendimiento en el cultivo de maíz en el Ecuador. Para su control se emplean muchos productos químicos, generalmente nocivos para la salud humana y causando graves daños a los diferentes ecosistemas de la biosfera. Como una alternativa más amigable se evaluó en laboratorio la efectividad de varios insecticidas comerciales formulados a base de microorganismos biológicos y extractos de plantas para el control biológico de gusano cogollero. Los insecticidas evaluados en laboratorios contra larvas en estadío 3 fueron: Beauveria bassiana, Bacillus thuringiensis, Aceite de neem), así como un insecticida químico, como control positivo (Spinetoram). Para esta investigación se utilizó un diseño completamente al azar con evaluaciones cada 24 horas durante cuatro días a la misma hora. El producto más eficaz para el control de gusano cogollero en relación a la mortalidad transcurrida las 96 horas de evaluación fue: el B. thuriguiensis a una dosis baja de (1.95ml - 0.39L), obteniéndose una mortalidad del 100%; seguido del Neem a una dosis baja de (1.95ml - 0.39L) y B. bassiana a una dosis media de (3.90ml - 0.78L), obteniéndose una mortalidad del 97,5 y como control químico positivo el Spinetoram, a una dosis baja de (0.39cc - 0.78L). Los productos más eficaces para el control de gusano cogollero bajo condiciones de laboratorio en relación al tiempo de acción a las 24 horas de evaluación fueron: el Neem con el 17,5% y Spinetoram con el 100% de tasa de mortalidad, mientras con B. thuriguiensis y B. bassiana no hubo mortalidad en el bioensayo. | es_ES |
| dc.format.extent | 116 p | es_ES |
| dc.language.iso | es | es_ES |
| dc.publisher | BABAHOYO: UTB, 2021 | es_ES |
| dc.rights | Atribución-NoComercial-SinDerivadas 3.0 Ecuador | * |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/3.0/ec/ | * |
| dc.subject | Neem | es_ES |
| dc.subject | Spodoptera frugiperda | es_ES |
| dc.subject | Beauveria bassiana | es_ES |
| dc.subject | Bacillus thuriguiensis | es_ES |
| dc.title | Efecto de un insecticida formulado a base de neem (Azadiracha indica) sobre el desarrollo larval de Spodoptera frugiperda (J. E. Smith) en maíz (Zea mays L.) bajo condiciones de laboratorio. | es_ES |
| dc.type | masterThesis | es_ES |
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Except where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 Ecuador