Biological efficacy and transstadial effects of nuclear polyhedrosis virus in Spodoptera albula
Guardado en:
| Autores: | , , , , |
|---|---|
| Estado: | Versión publicada |
| Fecha de Publicación: | 2026 |
| Descripción: | Introduction. Spodoptera albula causes considerable economic losses in vegetables; therefore, it is important to explore biological alternatives for its management. Objective. To determine the biological efficacy of three concentrations of the nuclear polyhedrosis virus (75, 100, and 150 larval equivalents [LE]) on mortality in Spodoptera albula larvae and its transstadial effect. Materials and methods. The study was conducted from February to April 2021 at the Center for Research in Agricultural and Veterinary Sciences of the National Autonomous University of Nicaragua, León. A completely randomized experimental design was used with four treatments ―three concentrations: 75 LE (1.94 × 10¹⁰ polyhedral inclusion bodies [PIB]), 100 LE (6.164 × 10¹⁰ PIB), and 150 LE (7.52 × 10¹⁰ PIB), and a control free of the nuclear polyhedrosis virus― and five replicates. The experimental unit consisted of 30 Spodoptera albula larvae in the fourth and fifth instars, for a total of 150 larvae per treatment and an experimental population of 600 individuals. Infestation was carried out using a cube of soy-based artificial diet sprayed with the virus and placed in plastic cups, one larva per cup. Results. The three concentrations of nuclear polyhedrosis virus evaluated showed statistically significant differences in efficacy compared to the control treatment. The 100 LE dose showed the highest mortality (100 %). For the 75 and 150 LE treatments, transstage contamination was observed, with 3.33 % mortality in the pupal stage and 5 % adult mortality for the 75 LE treatment. Conclusions. The three concentrations increased larval mortality in Spodoptera albula and produced a transstadial effect that reduced adult survival. |
| País: | Portal de Revistas UCR |
| Institución: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| Lenguaje: | Español Inglés |
| OAI Identifier: | oai:portal.revistas.ucr.ac.cr:article/7114 |
| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/ragromeso/article/view/7114 |
| Palabra clave: | Baculoviridae bioinsecticides pest control Noctuidae nucleopolyhedrovirus bioinsecticidas control de plagas nucleopoliedrovirus |