Sitophilus  granarius  L. (Coleoptera: Curculionidae), the granary weevil, is a major stored product pest in many countries and specially in Egypt, causing tremendous losses estimated by 10-15%. The present study was aimed to assess the impact of eleven essential oils from : Lavender oil (Lavandula  angustifolia Mill),  Rosemary oil (Rosmarinus officinalis L.), Garlic oil (Allium  sativum  L.), Soybean oil (Glycine  max L. Merr), Sesame oil (Sesamum indicum L.), Cardamom oil (Elettaria cardamomum  L.  Maton), Castor oil (Ricinus  communis  L.),  Camphor oil (Cinnamomum  camphora  L.),  Olive oil (Olea  europaea  L.), Bitter almond oil (Prunus  amygdalus  B.), Coconut oil (Cocos  nucifera  L.)showing its  toxicity and insecticidal activity against the adult granary weevil, Sitophilus granarius L. Tested plant oils were used with different concentrations and different exposure times  (7,10,15 and 30 days). The results showed that the activities of tested oils were better at higher concentrations and higher durations and that was confirmed via the results of LC₅₀ values ​​obtained and variations between the different tested oils.