Toxicity of Anadenanthera macrocarpa (Fabaceae: Mimosoideae) and Bougainvillea buttiana (Nyctaginaceae) extracts to lepidopteran pests

• Autor(a) principal: Carvalhinho, Diego Tavares
• Data de Publicação: 2017
• Outros Autores: Rodrigues, Raimundo Henrique Ferreira, Carneiro, Eliane, Lopes, Gleidyane Novais, Silva, Luciana Barboza, Pavan, Bruno Ettore
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Biotemas (Online)
• Texto Completo: https://periodicos.ufsc.br/index.php/biotemas/article/view/2175-7925.2017v30n2p15

For small and medium agricultural production, vegetal extracts are highly efficient at managing pests because they control a wide range of arthropods. The objective of this research was to evaluate the toxic effects of Anadenanthera macrocarpa (Fabaceae: Mimosoideae) and Bougainvillea buttiana (Nyctaginaceae) extracts on Helicoverpa armigera (Hübner), Spodoptera cosmioides (Walker) and Spodoptera frugiperda (Smith) (Lepidoptera: Noctuidae). Helicoverpa armigera and S. cosmioides caterpillars were maintained on soybean leaf discs, and S. frugiperda was maintained on corn leaf discs, treated with diluted aqueous extracts at concentrations of 0, 500, 1,000, 2,500, 4,000, 5,000, 10,000 and 15,000 mg.L-1. The lethal and sublethal effects of the extracts on the insects were measured. According to the results, the concentration of 500 mg.L-1 of the A. macrocarpa extract caused the highest percentage of mortality (93.33%) of H. armigera. The extract of B. buttiana caused 86.67% and 60% mortality of H. armigera (1,000 mg.L-1) and S. cosmioides (4,000 mg.L-1), respectively. The reduction of the emergence of adults was the main sublethal effect found for S. cosmioides and S. frugiperda. Considering the results, the vegetal extracts used in this research are a potential alternative for the management of lepidopteran pests.