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Chem Biodivers

Title:		"Chemical Composition, Toxicity and Repellency of Inula graveolens Essential Oils from Roots and Aerial Parts against Stored-Product Beetle Tribolium castaneum (Herbst)"
Author(s):		Ben Mustapha M; Algethami FK; Elamin MR; Abdulkhair BY; Chaieb I; Ben Jannet H;
Address:		"Laboratory of Heterocyclic Chemistry, Natural Products and Reactivity (LR11ES39), Team: Medicinal Chemistry and Natural Products, Faculty of Science of Monastir, University of Monastir, Avenue of Environment, 5019, Monastir, Tunisia. Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh, 11623, Saudi Arabia. Laboratory of Production and Protection for a Sustainable Horticulture (LR21AGR03) Regional Center of Research on Horticulture and Organic Agriculture, 57, University of Sousse, ChottMariem, TN-4042, Tunisia"
Journal Title:		Chem Biodivers
Year:		2023
Volume:		20230227
Issue:		3
Page Number:		e202200978 -
DOI:		10.1002/cbdv.202200978
ISSN/ISBN:		1612-1880 (Electronic) 1612-1872 (Linking)
Abstract:		"In this work, essential oils extracted from roots and aerial parts of Inula graveolens by hydrodistillation and their fractions obtained by chromatographic simplification were first investigated for their chemical composition by GC/MS and then evaluated for the first time for their repellency and contact toxicity properties against Tribolium castaneumadults. Twenty-eight compounds were identified in roots essential oil (REO), which accounted for 97.9 % of the total oil composition, with modhephen-8-beta-ol (24.7 %), cis-arteannuic alcohol (14.8 %), neryl isovalerate (10.6 %) and thymol isobutyrate (8.5 %) as major constituents. Twenty-two compounds were found in the essential oil from aerial parts (APEO), which accounted for 93.9 % of the total oil, with borneol (28.8 %), caryophylla-4(14),8(15)-dien-6-ol (11.5 %), caryophyllene oxide (10.9 %), tau-cadinol (10.5 %) and bornyl acetate (9.4 %) as main compounds.REO and APEO displayed stronger repellency after 2 h of exposure (80.0 and 90.0 %, respectively) against T. castaneum at the concentration of 0.12 muL/cm(2) . After fractionation, fractions R(4) and R(5) exhibited greater effects (83.3 % and 93.3 %, respectively) than the roots essential oil. Furthermore, the fractions AP(2) and AP(3) showed higher repellency (93.3 and 96.6 %, respectively) than the aerial parts oil. The LD(50) values of oils from roots and aerial parts topically applied were 7.44 % and 4.88 %, respectively. Results from contact toxicity assay showed that fraction R(4) was more effective than the roots oil with LD(50) value of 6.65 %. These results suggests that essential oils of roots and aerial parts from I. graveolens may be explored as potential natural repellent and contact insecticides against T. castaneum in stored products"
Keywords:		"Animals *Coleoptera *Insect Repellents/pharmacology/chemistry *Insecticides/chemistry *Inula *Oils, Volatile/chemistry Plant Components, Aerial/chemistry *Tribolium Inula graveolens Tribolium castaneum chemical composition essential oils insecticidal acti;"
Notes:		"MedlineBen Mustapha, Mayssa Algethami, Faisal K Elamin, Mohamed R Abdulkhair, Babiker Y Chaieb, Ikbal Ben Jannet, Hichem eng 221412005/Imam Mohammad Ibn Saud Islamic University (IMSIU), Saudi Arabia/ Switzerland 2023/02/23 Chem Biodivers. 2023 Mar; 20(3):e202200978. doi: 10.1002/cbdv.202200978. Epub 2023 Feb 27"