Effect of aqueous extracts of Serjania spp. on the oviposition of Plutella xylostella L. (Lepidoptera: Plutellidae)

• Autor(a) principal: Faca, Eduardo Carvalho
• Data de Publicação: 2021
• Outros Autores: Ferreira, Eliana Aparecida, Silva, Rosicleia Matias da, Mussury, Rosilda Mara
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Research, Society and Development
• Texto Completo: https://rsdjournal.org/index.php/rsd/article/view/21802
• topic: Biopesticides; Botanical Extracts; Cruciferous Moth; Dissuasion; Sapindaceae.; Bioplaguicidas; Disuasión; Extractos Botánicos; Polilla Crucífera; Sapindaceae.; Bioinseticidas; Dissuasão; Extratos Botânicos; Sapindaceae; Traça-das-crucíferas.

The bioprospecting of plant species for the development of bioinsecticides can contribute to the control of Plutella xylostella populations in the brassica culture. The objective of this research was to study the effect of the aqueous extracts of Serjania erecta and Serjania marginata, at concentrations 5 and 10%, on the oviposition of P. xylostella. For this, two tests were performed: the first consisted of a no-choice test, in which a treated cabbage disk and a pair of P. xylostella adults were placed in each cage; the second consisted of a free-choice test, where four treated discs (two discs treated with plant extract and two discs treated with distilled water) and a pair of adults of P. xylostella were placed in each cage. The no-choice oviposition experiment was carried out in a completely randomized experimental design (DIC) in a double factorial scheme (3x2) with 15 replications per treatment and the no-choice experiment was carried out in a completely randomized experimental design (DIC). The number of eggs (fecundity) and the number of newly emerged larvae (fertility of eggs) were counted daily for 10 days and the egg viability (%) and the Oviposition Dissuasion Index (ODI) were calculated. The results indicated the deterrent effect of the two plant species, with reduced fecundity, fertility and egg viability in treatments with aqueous extracts of S. erecta and S. marginata, at concentrations of 5% and 10%, with a concentration of 10% presented better results for the no-choice test. Therefore, the two plant species presented insecticidal action, acting in the reduction of fecundity, fertility, egg viability and in the deterrence of oviposition of this microlepidoptera, contributing to its control in vegetable crops.