Skip to Main content Skip to Navigation
Journal articles

Fumigant toxicity of Lavandula spica essential oil and linalool on different life stages of Tribolium confusum (Coleoptera: Tenebrionidae)

Abstract : The confused flour beetle, Tribolium confusum, is a common and severe pest of stored products. Here, using fumigation tests during four different exposure times, we evaluated the toxicity of different doses of essential oil of spike lavender, Lavandula spica and one of its major constituents, linalool, on different life stages of T. confusum under laboratory conditions. The toxicity of the L. spica oil and linalool varied as a function of the developmental stage and treatment duration. Young larvae (L1) were the most susceptible to toxic effects, with LC50 = 19.535 mu l/L of air for L. spica oil and LC50 = 14.198 mu l/L of air for linalool after 24 h of exposure, whereas older larvae (L8) were affected only very little by fumigation. Linalool caused higher egg mortality than L. spica oil at equivalent doses, but lower mortality in pupae and adults. Emergence of intact adult insects from surviving eggs, larvae and pupae was further reduced as a function of dose and exposure time to both L. spica oil and linalool compared to control-treated insects. Our results show that L. spica oil and linalool might be suitable for biological control of T. confusum, but tests at a larger scale are necessary to confirm our results.
Document type :
Journal articles
Complete list of metadata

https://hal.inrae.fr/hal-03319817
Contributor : Anne-Sophie Grenier <>
Submitted on : Friday, August 13, 2021 - 10:02:22 AM
Last modification on : Sunday, August 15, 2021 - 3:15:33 AM

Links full text

Identifiers

Citation

Lynda Kheloul, Sylvia Anton, Christophe Gadenne, Abdellah Kellouche. Fumigant toxicity of Lavandula spica essential oil and linalool on different life stages of Tribolium confusum (Coleoptera: Tenebrionidae). Journal of Asia-Pacific Entomology, Elsevier, 2020, 23 (2), pp.320-326. ⟨10.1016/j.aspen.2020.02.008⟩. ⟨hal-03319817⟩

Share

Metrics

Record views

12