Insecticidal effect of nanoencapsulated essential oils from Zanthoxylum rhoifolium (Rutaceae) in Bemisia tabaci populations

Abstract

a b s t r a c tThe purpose of this study was to develop and characterize biodegradable nanospheres containing essential oils from Zanthoxylum rhoifolium leaves and evaluate its insecticidal effect in Bemisia tabaci populations. The essential oil from Z. rhoifolium leaves exhibited an average yield of 0.03% and presented ␤-elemene (31.26%), D-germacrene (18.16%), ␤-caryophyllene (12.09%), ␦-elemene (7.63%), ␤-cedrene (6.69%), bicyclogermacrene (4.57%) and E-caryophyllene (3.63%) as main components. The PCL nanospheres containing this essential oil exhibited encapsulation efficiency higher than 96%, pH close to 5, particle diameter smaller than 500 nm and zeta potential values of approximately −20 mV. The in vitro release profile was characteristic of biphasic release, i.e., a fast initial release, followed by slow release for 12 h or more. The biological assay results were also significant and as such both the in natura and nanoencapsulated essential oils resulted in reductions as high as 95% in the number of eggs and nymphs compared with our control. Collectively these results suggest that both in natura and nanoencapsulated essential oils from Z. rhoifolium leaves can potentially be used in B. tabaci control in association with integrated pest management practices.

Insecticidal activity of polycaprolactone nanocapsules loaded with Rosmarinus officinalis essential oil in Tribolium castaneum (Herbst)

“…It can be used to prepare novel formulations, such as insecticides, pesticides, and insect repellants (Khoobdel et al ; Owolade & Ogunleti ; Barik et al ; Gajbhiye et al ; Goswami et al ). The nanoparticles made by Christofoli et al () with Zanthoxylum rhoifolium 's EO had better protection against degradation and oxidation processes under sunlight and heat conditions. The necessary concentration of the applied doses and environmental impact would be reduced when this new formulation is used (Christofoli et al ).…”

Chemical Composition of Essential Oils from SixZanthoxylumSpecies and Their Repellent Activities against Two Stored-Product Insects

“…Among various investigated plants, the Zanthoxylum genus stands out for its extracts and essential oils exhibited insecticidal, fungicidal, antibacterial, and fumigant activities [16,19,22]. Here, we first report repellent activities of six Zanthoxylum species including Z. armatum, Z. dimorphophyllum, Z. dimorphophyllum var.…”

“…Also, Zanthoxylum species have a folklore history in the treatment of various diseases, such as inflammation [15], toothache, lumbago [16], ascarid infection [17], sickle-cell anaemia, and malaria. Literatures have also shown that Zanthoxylum species possess a potential antiinsect [7,18,19], antimicrobial [20], antibacterial [21], and antifungal [22] activities.…”

Fytosanitaire na-oogst behandel- en detectietechnieken voor plaagorganismen in tuinbouw

“…Met het gebruik van een slow-release systeem van Zanthoxylum rhoifolium olie op een zeer hoge concentratie (5%), werd 95% reductie van eieren en nimfen van B. tabaci bereikt (Christofoli et al 2015). Etherisch olie van Adenocalymma alliaceum damp was effectief tegen zowel adulten als nimfen van B. tabaci, hoewel de nimfen moeilijker te doden waren dan de adulten: om de helft van de nimfen te doden duurt het 30 uur bij een concentratie van 1ul/L, terwijl voor de adulten maar 2 uur nodig was met dezelfde concentratie ( (Fanela et al 2016)).…”