Fumigant and repellent effects of Eucalyptus cinerea and Eucalyptus maidenii essential oils on Callosobruchus maculatus F. 1775 (coleoptera: Bruchidae) and Sitophilus oryzae L. 1763 (coleoptera: Curculionidae) Mariam Hedjal-Chebheb1, Ferroudja Medjdoub-Bensaad1,*, Karima Toudert-Taleb1, Djouda Mediouni-Bendjemaa2 1Laboratoire de production, sauvegarde des especes menace et des recoltes. Influence des variations climatiques. Departement de Biologie. Faculte des Sciences Biologiques et des Sciences Agronomiques. Universite Mouloud Mammeri de Tizi-Ouzou15000. Algerie 2Laboratory of Biotechnology Applied to agriculture, INRAT, Rue Hedi Karray, University of Carthage, 2080Ariana, Tunisia *Corresponding Author: Medjdoub-Bensaad Ferroudja, Laboratoire de production, sauvegarde des especes menace et des recoltes. Influence des variations climatiques. Departement de Biologie. Faculte des Sciences Biologiques et des Sciences Agronomiques. Universite Mouloud Mammeri de Tizi-Ouzou15000. Algerie. E-mail: medjdoubferroudja@yahoo.fr
Online published on 7 July, 2022. Abstract Eucalyptus maidenii and Eucalyptus cinerea essential oils of were extracted by the drive technique with water vapor and analyzed by means of gas chromatography coupled to mass spectrometry. The results reveal that the monoterpene compounds are the majority (57.69 and 51.28%) compared to sesquiterpenes (37.14 and 23.07%), and the 1.8- cineole is the most represented (70, 89 and 71.93%), respectively for E. cinerea. and E. maidenii. In fumigation tests, after 24 hours of exposure, with a dose of 12.5μl/l, E. cinerea and E. maidenii caused 100% adult mortality in Sitophylus oryzae. The same mortality rate was achieved at a dose of 25µl/l, with adults of Callosobruchus maculatus. The adults of S. oryzae are more sensitive to E. cinerea and E. maidenii with respectively, LD50 = 8.45 μl/l and 8.95 µl/l, LD95 = 10.45μl/l and 11.62 μl/l, compared to C. maculatus, with LD50 = 11.75 μl/l and 12.35 μl/l, and LD95 = 26.90 μl/l and 19.07μl/l for, respectively, E. cinerea and E. maidenii essential oils. Top Keywords Essential oils, CGMS, Callosobruchus maculatus, Sitophilus oryzae, Inhalation, Repellency, LD50, LD95. Top |