AGROBIOLOGIA
Volume 11, Numéro 1, Pages 2336-2345
2021-06-30

Insecticidal Activty Of Three Essential Oils Combined To Mineral Substances Against Tribolium Confusum Duval 1868 (coleoptera, Tenebrionidae)



Authors : Zahi Mohamed Elhadi . Mouhouch Faiza . Hazzit Mohamed .

Abstract

Description of the subject. Biopesticides such as essential oils and inert dusts attract frequently attention of researchers as alternative safer to synthetic chemicals. Objective. This study was conducted to evaluate the toxicity of three essential oils (Eos) from three plants: Zingiber officinalis (R.), Syzygium aromaticum (L.), and Origanum floribundum (M.) combined with two mineral substances; white clay and diatomaceous earth (DE) against a secondary pest of stored commodities: Tribolium confusum (Duv). Methods. The selected plants were subjected to steam distillation using a Clevenger apparatus. The EOs compositions were identified using GC-MS analysis. The bioassays were conducted under laboratory conditions. Results. The results revealed that the oregano EO had the highest toxicity in both contact (at 0.27µl/cm2) and inhaled tests (at 0.23µl/cm3) with 100% of mortality after 48h of treatment. Whereas, EOs + diatomaceous earth after 48h, exhibited an increase in mortality compared to those of EOs or DE used separately. Conclusion. The obtained findings exerted a biocidal action of the essential oils against T. confusum, while the mineral substances can perform the function of carrier agent in the formulation of biopesticides. .

Keywords

Keywords: Essential Oils; Tribolium confusum; mineral substance; combined treatment; insecticidal activity.

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