Insecticidal and Repellent Activity of Thymus quinquecostatus Celak. Essential Oil and Major Compositions against Three Stored‐Product Insects

Abstract

Thymus quinquecostatus Celak. of the Lamiaceae family has a long history of dual use of medicine and food with high economic value, and has been proved to have good antioxidative, antimicrobial, and antidiabetic activities. Essential oil (EO) extracted from the aerial part of T. quinquecostatus was obtained by hydrodistillation and analyzed by gas chromatography‐mass spectrometry (GC/MS) and GC. Totally 45 compounds were identified accounting for 98.5 % of the EO. The major constituents of the EO were linalool (52.003 %), borneol (10.911 %) and anethole (5.325 %). Fumigant, contact and repellent activity of T. quinquecostatus essential oil (EO) against Tribolium castaneum (Coleoptera: Tenebrionidae), Lasioderma Serricorne (Coleoptera: Anobiidae), Liposcelis bostrychophila (Psocoptera: Liposcelididae) were evaluated in this work. T. quinquecostatus EO and three major constituents showed varying degrees of insecticidal and repellent activities to three stored‐product insects. Anethole stated the best fumigant and contact activity than others did to all three insect species. EO and compounds showed general repellent activity against three target insects. This work suggests that the EO of T. quinquecostatus has promising potential to be developed into botanical pesticides and repellents controlling pest damage in warehouses and grain stores.

Chemical Profiles and Insecticidal Potential of Essential Oils Isolated from Four Thymus Species against Rhyzopertha dominica (F.)

“…In this study, though reductions in glycogen content by T. eriocalyx and T. fallax essential oils and in lipid content by T. kotschyanus essential oil were not significantly different than controls (p < 0.05), the energy content of R. dominica adults in other treatments was reduced. These results agreed with Yazdani et al [54], Jyoti et al [55], and Moutassem et al [18] who discovered the reduction in protein, carbohydrate, and lipid contents of insect pests treated with Thymus essential oils. Insects normally are able to convert carbohydrates into lipids [53], which could explain the relatively lower reduction in lipid content due to the essential oil of T. kotschyanus compared to other essential oils.…”

“…Fumigant toxicity of Thymus pallescens Noë. essential oil, with carvacrol (56.64%), p-cymene (16.36%), and thymol (8.71%) as main compounds, against the granary weevil (Sitophilus granarius L.) was found by Moutassem et al [18]. Along with lethality, the T. pallescens essential oil decreased total protein, lipid, and carbohydrate of treated weevil.…”

Insecticidal Effect of Thymus citriodorus (Pers.) Schreb (Lamiaceae) Essential Oil on Sitophilus granarius (Linnaeus, 1758) (Coleoptera: Dryophthoridae) and Tribolium castaneum (Herbst, 1797) (Coleoptera: Tenebrionidae)

“…The efficacy of the essential oil varied based on the insect species, dosage, and exposure duration. Previous studies have examined the biological activities of Thymus species essential oils (Moazeni et al, 2014;Saroukolai et al, 2010;Jarrahi et al, 2016;Lu et al, 2021;Lazarević et al, 2020;Barros et al, 2022;Rozman et al, 2007;Demeter et al, 2021;Moutassem et al, 2021) and specific compounds found in these oils (Papachristos et al, 2004;Chu et al, 2010;Maga et al, 2000;Huang et al, 2021;Liska et al, 2010;Jiang et al, 2016) for their efficacy against stored product pests in controlled laboratory conditions.…”

Chemical profiling and bioactivities of essential oils from Thymus capitatus and Origanum compactum against Tribolium castaneum

“…For instance, Thymus vulgaris was a highly studied species, and was reported as a potent repellent against stored products insects such as Sitophilus zeamais, Plodia interpunctella [ 20 , 37 , 38 ] as well as other phytophageous species ( Bemisia tabaci, and Meligethes aeneus ) [ 38 , 39 ]. Thymus quinquecostatus was generally repellent against three stored products T. castaneum, Lasioderma serricorne, and Liposcelis bostrychophila [ 40 ]. Thymus persicus EO exhibited strong repellency against Tribolium castaneum (Herbst) and Callosobruchus maculatus [ 41 ].…”