Abstract

The contact insecticidal activity of in natura and maltodextrin/Angum gum nanoencapsulated essential oils of Eucalyptus globulus Labill and Zataria multiflora Bioss was evaluated against the third instar larvae of Ephestia kuehniella (Lepidoptera: Pyralidae). The essential oil from E. globulus exhibited an average yield of 1.19%, and presented 1,8-cineol (59.08%) as the major component, while Z. multiflora essential oil, with an average yield of 1.5%, was characterized by thymol (26.12%) and carvacrol (25.31%) as the main components. The encapsulated particles presented spherical morphology with regular and homogeneous external surfaces, ranging from 60 to 130 nm in diameter. Laboratory bioassays estimated the contact LC₅₀ of in natura and encapsulated essential oils as 13.07 and 1.34 µL L⁻¹ for E. globulus and 1.47 and 5.87 µL L⁻¹ for Z. multiflora, respectively. The results presented here, which are probably the first to be reported, suggested that essential oil nanoencapsulation represents an efficient method for enhancing both insecticidal activity and the durability of the active ingredients for sustainable pest management.

摘要

的接触杀虫活性在NATURA的和麦芽糖糊精/ Angum胶纳米胶囊化精油蓝桉Labill和Zataria野蔷薇的BIOS被反对的第三龄幼虫评价Ephestia kuehniella（：螟蛾科鳞翅目）。球形E.globulus的精油平均产量为1.19％，以1,8-cineol（59.08％）为主要成分，而多花Z. multiflora精油的平均收率为1.5％，其特征在于百里酚（26.12％）和香芹酚（25.31％）是主要成分。包封的颗粒呈现球形形态，具有规则且均匀的外表面，直径范围为60至130 nm。实验室生物测定推定的接触LC ₅₀的在NATURA和包封的精油13.07和1.34μL大号^-1为蓝桉和1.47和5.87μL大号^-1为Z.野蔷薇， 分别。此处提出的结果（可能是第一个被报道的）表明，精油纳米囊化代表了一种有效的方法，可增强杀虫活性和活性成分的持久性，以进行可持续的有害生物管理。