Chemical Composition, Larvicidal and Ovicidal Activities, and Enzyme Inhibition Capacity of Essential Oils Against (Fabricius).

Due to their effectiveness at low doses and relative safety for non-target species, plant essential oils (EOs) are considered ideal alternatives to conventional pesticides for pest control. In this study, the chemical composition of () EO was construed by Gas Chromatography-Mass Spectrometry (GC-MS), and its larvicidal and ovicidal activity against omnivorous pests () was assessed. The effects of EO on the activities of antioxidant detoxification enzymes were also measured. GC-MS analysis revealed that the main constituents of EO were thymol (42.1%), p-cymene (22.4%), and γ-terpinene (18.6%). In the larvicidal toxicity experiment, the EO demonstrated LC50 values of 0.606 and 0.664 mg/mL against the second- and third-instar larvae of respectively, after 48 h exposure. Moreover, an EC value of 0.905 mg/mL was measured against eggs. In , EO treatment reduced the enzymatic activity of ESTs and GST and, conversely, increased the enzymatic activity of AChE. Overall, this study demonstrated that EO has the potential to be implemented as a novel eco-friendly insecticide against .