The objective of this study was to evaluate the efficacy of some plant oils (Mustard oil, Basil oil, Chamomile oil, Anise oil, Orange oil and Rosemary oil) against adult of T. castaneum and S. oryzae at 30±1°C and 65 ± 5 % R.H. Meanwhile, the efficacy of some plant extracts (Jatropha curcas, Peganum harmala, Callistemon citrinus, Melaleuca leucadendron, Rosmarinus officinalis and Punica granatum) were evaluated against T. castaneum and S. oryzae at 30±1 ° C and 65 ± 5 % R.H. Experiments were performed at the laboratory of the plant protection department of the Faculty of Agriculture, Moshtohor, Benha University.