Chemical Composition and Insecticidal Activity against Tribolium Castaneum of Thapsia garganica L. Seed Essential Oil

Author:

Khemis Eya1,Mustapha Mayssa Ben1,Chaieb Ikbel2,Ascrizzi Roberta34,Flamini Guido34,Harrath Abdel Halim5,Jannet Hichem Ben1ORCID,Zardi‐Bergaoui Afifa1

Affiliation:

1. 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

2. University of Sousse Regional Center of Research on Horticulture and Organic Agriculture, 57, ChottMariem TN-4042 Sousse Tunisia

3. Dipartimento di Farmacia Università di Pisa Via Bonanno 6 56126 Pisa Italy

4. Centro Interdipartimentale di Ricerca “Nutraceutica e Alimentazione per la Salute” Nutrafood University of Pisa Italy

5. Department of Zoology College of Science King Saud University Riyadh 11451 Saudi Arabia

Abstract

AbstractDue to the several side effects of synthetic pesticides, including environmental pollution, threats to human health, and the development of pest resistance to insecticides, the use of alternative healthy, available and efficient agents in pest management strategies is necessary. Recently, the use of essential oil obtained from aromatic plants has shown significant potential for insect pest management. For this reason, the essential oil isolated from seeds of Thapsia garganica L. was investigated for the first time for its chemical profile, and its toxicity and repellency effects against Tribolium castaneum adults. Qualitative and quantitative analyses of the chemical composition by gas chromatography coupled to mass spectrometry (GC/MS) revealed the presence of 18 organic volatiles representing 96.8 % of the total constituents. The main compounds were 1,4‐dimethylazulene (51.3 %) followed by methyl palmitate (8.2 %), methyl linoleate (6.2 %) and costol (5.1 %). Concerning the repellent effect, results revealed that SEO (Seed Essential Oil) was very repellent towards T. castaneum adults, with 100 % repellency after 2 h of exposure. Furthermore, the essential oil exhibited remarkable contact toxicity against T. castaneum (93.3 % of mortality) at the concentration of 10 % (v/v). The median lethal dose (LD50) of the topical application of the seed essential oil was 4.4 %. These encouraging outcomes suggested that the essential oil from T. garganica seeds could be considered a potent natural alternative to residual persistent and toxic insecticides.

Publisher

Wiley

Subject

Molecular Biology,Molecular Medicine,General Chemistry,Biochemistry,General Medicine,Bioengineering

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