Structural Characterization of Nanoparticles Loaded with Garlic Essential Oil and Their Insecticidal Activity againstTribolium castaneum(Herbst) (Coleoptera: Tenebrionidae)

Abstract

The aim of this work was to characterize polyethylene glycol (PEG) coated nanoparticles loaded with garlic essential oil and to evaluate their insecticidal activity against adult Tribolium castaneum . Preparation of nanoparticles was carried out using the melt-dispersion method, a very simple, convenient, and low-cost technique. The oil-loading efficiency could reach 80% at the optimal ratio of essential oil to PEG (10%). The morphology results and nanoparticle size showed that the nanoparticles had a round appearance and good dispersion, <240 nm in the average diameter, characterized by transmission electron microscope and dynamic light scattering, respectively. The abundance and percentage content of the major components did not show any significant difference between free and nanoencapsulated oil when analyzed by gas chromatography-mass spectrometry. The control efficacy against adult T. castaneum remained over 80% after five months, presumably due to the slow and persistent release of the active components from the nanoparticles. In contrast, the control efficacy of free garlic essential oil at the similar concentration (640 mg/kg) was only 11%. This indicates that it is feasible to use the PEG coating nanoparticles loaded with garlic essential oil to control the store-product pests.

In vitro and in vivo antioxidant activities of polyphenol extracted from black garlic

“…This imbalance can cause the excessive concentration of free radicals in body, leading to the oxidative damage of cell membranes, lipids, nucleic acids and proteins, which results in the cell structure and function destruction and occurrence and development of diseases (Blokhina et al, 2003). Garlic has the antibacterial (Farbman et al, 1993), antiviral (Tsai et al, 1985), anti-inflammatory (Kim et al, 2013b), insecticidal (Yang et al, 2009), blood lipid regulating (Bordia et al, 1998), blood glucose decreasing (Bordia et al, 1998), detoxification (Sheen et al, 1996), atherosclerosis preventing (Bordia et al, 1977) and immunity improving (Qiu et al, 2014) functions. It is reported that, the pharmacological effects of garlic are closely related to its antioxidant properties (El-Din et al, 2014).…”

Efficacy of nanostructured silica as a stored pulse protector against the infestation of bruchid beetle, Callosobruchus maculatus (Coleoptera: Bruchidae)

“…Much larger quantities of amorphous silica dust are later used to control the adult bean bruchids (Giga and Chinwada 1994). The insecticidal activity to an extent of 80 % using polyethylene glycol-coated nanoparticles loaded with garlic essential oil against Tribolium castaneum was already carried out in processed stored products (Yang et al 2009). The application of diverse kinds of nanoparticles for the control of rice weevil, Sitophilus oryzae was also studied (Goswami et al 2010).…”

Nanotechnologies associated to floral resources in agri-food sector

“…Evidently, nanotubes ingredient would penetrate insect body and ultimately alter particular physiological functions. Equally, encouraging results were recorded from the use of nanotubes filled with garlic-essential oil (Yang, Li, Zhu & Lei, 2009). …”