Évaluation de l’effet bioinsecticide de l’extrait hydroalcoolique de Chrysanthemum coronarium sur trois bioagresseurs : Aphis spiraecola, Aphis fabae et Dactylopius opuntiae

Abstract

This study evaluates the insecticidal potential of polyphenolic extracts from Chrysanthemum coronarium L. against three pest insects: Aphis spiraecola, Aphis fabae, and Dactylopius opuntiae. Polyphenols were extracted using a Soxhlet apparatus, and the extract was then tested in vitro at concentrations ranging from 5% to 50%. The results reveal a dose-dependent efficacy, with respective LD₅₀ values of 3.46%, 27.62%, and 21.76% for the targeted species. Concentrations above 30% induced complete mortality within 48 hours, while lower doses required prolonged exposure to achieve similar lethal effects. These findings suggest that the bioactive compounds in C. coronarium may serve as promising biological control agents, offering an alternative to synthetic pesticides.