Urea-Formaldehyde Nano-encapsulation Enhances Bunium persicum Essential Oil's Toxicity against Brevicoryne brassicae

This study investigated the aphicidal activity of both pure and nanoencapsulated Bunium persicum (Boiss.) Fedtsch Essential Oils (EO) against Brevicoryne brassicae L.. The EO obtained through hydrodistillation and analyzed by Gas Chromatography and Mass Spectrophotometry (GC-MS), contained γ-terpinen (۳۶.۶۲%), ρ-cymene (۱۸.۴۱%), carvacrol (۱۳.۶۰%), and cuminaldehyde (۱۳.۵۰%) as its major components. Nanocapsules were synthesized via in situ polymerization of an oil-in-water emulsion and characterized by Dynamic Light Scattering (DLS) and Transmission Electron Microscopy (TEM), revealing spherical particles with a median diameter of ۱۰.۸۸ nm and a low Polydispersity Index (PDI) of ۰.۰۵۷. Bioassays demonstrated that the nanoencapsulated formulation exhibited significantly higher toxicity than the pure EO, with lower contact LC۵۰ and LC۹۰ values of ۳۶۵.۴۳ and ۱۹۰۸.۴۶ µL L-۱ water, respectively, compared to the pure EO (۱۰۳۰.۴۰ and ۳۹۷۷.۰۸ µL L-۱ water). Similarly, the fumigant LC۵۰ and LC۹۰ values for the nanocapsules (۲۳.۱۵ and ۵۹.۴۹ µL L-۱ air) were significantly lower than those of the pure EO (۳۵.۰۷ and ۷۹.۵۹ µL L-۱ air). The findings suggest the potential of nanoencapsulated B. persicum EO in integrated pest management for controlling cabbage aphid.

کلیدواژه ها:

Aphid ، Biocompatible insecticide ، efficacy ، Encapsulated ، Nanoparticle