author(s)
Mey Jerbi, Amel Ben Hamouda, Faten Hamdi, Asma Laarif and Ikbal Chaieb

abstract
The objective of the present study was to investigate the insecticidal activity of essential oils from cultivated aromatic plants and their combinations against larvae of Spodoptera littoralis. Essential oils from Salvia officinalis, Mentha longifolia and Origanum majorana and their mixtures were tested by fumigation. The ability to kill more than 80% was observed in all tested essential oils at 200µL/Lair. In the case of individual essential oils, the LC₅₀ were ranged from the most toxic to the least as fellow: M. longifolia (31.66 μL/L) followed by S. officinalis (42.70 μL/L) and O. majorana (58.28 μL/L). Moreover, the combination of S. officinalis with M. longifolia and with O. majorana might be the two most effectives in controlling the insect than individuals essential oils and the other combinations. The investigation of the efficiency of each essential oil and combination allow us to create potent combinations for the development of powerful eco-friendly control agents.