The results depicted in Table 5 again showed that the saw- toothed grain beetle was more sensitive to both essential oils mainly to A. absinthium oil. The corresponding LD50 and LD95 val- ues were 0.209 and 1.963 L. Whereas, the red flour beetle was more tolerant to both oils, mainly A. herba-alba oil with corre- sponding LD50 and LD95 values of 7.432 and 133.323 L. Indeed, results revealed significant statistical differences between lethal doses means of oils (Table 5).