Repellent and fumigant toxic potential of three essential oils against Ephestia kuehniella
Abstract
Essential oils, when used as bio-insecticides in the control of insect pests of stored grains have shown specificity and variation in the potentiality of their mode of action. In the present study, three essential oils extracted from three aromatic plants of different families, white wormwood (Artemisia herba alba, Asteraceae), oregano (Origanum vulgare, Lamiaceae) and rue (Ruta montana, Rutaceae), were evaluated for their repellent and fumigant toxic potential against the flour moth larvae, Ephestia kuehniella (Lepidoptera, Pyralidae), under laboratory conditions. The essential oils extraction was done by the hydrodistillation method. The repellent activity was carried out in Petri dishes using a filter paper treated with different oil dilutions (25, 75, 100, 120, 130, 150 µL/mL). The fumigant toxicity was determined on three concentrations (50, 130, 150 µL/L air). Two plants were shown to be repellent against the E. kuehniella larvae. Origanum oil was the most repellent with 67% of repellency rate followed by Artemisia oil (46%) at 120µL/mL after 2 hours of exposure. The oil of R. montana had an attractant activity against the larvae and was the most toxic with 56.7% of larval mortality in the first 24 hours. The median lethal concentrations (LC50) recorded were 11.6, 175.4 and 1100.0 µL/L air for the plant oils R. montana, O. vulgare and A. herba alba, respectively. R. montana and O. vulgare essential oil are shown to be efficient with high toxic and repellent properties against E. kuehniella larvae. Their specific potential could be integrated in the selection of the best bioinsecticides for the optimum protection of stored grain.References
Bouzeraa, H., Bessila-Bouzeraa, M., Labed, N., Sedira, F., & Ramdani, L. (2018). Evaluation of the insecticidal activity of Artemisia herba alba essential oil against Plodia interpunctella and Ephestia kuehniella (Lepidoptera, Pyralidae). Journal of Entomology and Zoology Studies, 6(5), 145–150.
Chaubey, M. K. (2017). Fumigant and contact toxicity of Allium sativum (Alliaceae) essential oil against Sitophilus oryzae L. (Coleoptera: Dryophthoridae). Entomology and Applied Science Letters, 3(2), 43–48.
Huignard, J., Dugravot, S., Ketoh, K. G., Thibout, E., & Glitho, A. I. (2002). Utilisation de composés secondaires des végétaux pour la protection des graines d’une légumineuse, le niébé. Conséquences sur les insectes ravageurs et leurs parasitoides. In: Regnault-Roger, C., Philogène, B. J. R., & Vincent, C. (Ed.). Biopesticides d’Origine Végétale. Lavoisier Tech & Doc, Paris. Pp. 133–149.
Isman, M. B., Machial, C. M., Miresmailli, S., & Bainard, L. D. (2007). Essential oil-based pesticides: New insights from old chemistry. In: Ohkawa, H., Miyagawa, H., & Lee, P. W. (Eds.). Pesticide chemistry crop protection, public health, environmental healthy. Wiley-VCH, Weinheim. Pp. 201–209.
Jacobson, M. (1989). Botanical pesticides: Past, present, and future. In: Arnason, J. T., Philogene, B. J. R., & Morand, P. (Eds.). Insecticides of plant origin. ACS Symposium Series No. 387. American Chemical Society, Washington. Pp. 1–10.
Jayakumar, M., Arivoli, S., Raveen, R., & Tennyson, S. (2017). Repellent activity and fumigant toxicity of a few plant oils against the adult rice weevil Sitophilus oryzae Linnaeus 1763 (Coleoptera: Curculionidae). Journal of Entomology and Zoology Studies, 5(2), 324–335.
Kaufmann, C., & Briegel, H. (2004). Flight performance of the malaria vectors Anopheles gambiae and Anopheles atroparous (CPDF). Journal of Vector Ecology, 29(1), 140–153.
Pair, S. D., & Horvat, R. J. (1997). Volatiles of Japanese honeysuckle flowers as attractants for adult lepidopteran insects. US Patent No. 5665344, September 9, washington DS.
Paulraj, M. G., & Sahayaraj, K. (2002). Efficacy of Eclipta alba (L.) Hassk and Ocimum sanctum (L.) leaves extracts and powders against Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae) in groundnut. In: Sanjayan, K. P., Mahalingam, V., & Muralirangan, M. C. (Eds.). Vistas of entomological research for the new millenium. Gill Research Institute, Chennai. Pp. 80.
Torto, B. (2011). Chemical signals as attractants, repellents and aggregation stimulants. Chemical Ecology. In: Hardege, J. D. (Ed.). Encyclopedia of life support systems. Developed under the auspices of the UNESCO. EOLSS Publishers, Oxford. Pp. 186–199.
Tripathi, A. K., Upadhyay, S., Bhiyan, M., & Bhattacharya, P. R. (2009). A review on prospects of essential oils as biopesticide in insect-pest management. Journal of Pharmacognosy and Phytotherapy, 1(5), 52–63.



