The present study was carried out to evaluate the toxicities of celery, camphor
and garlic oils against the rice weevil, Sitophilus oryzae adults through laboratory
tests by treating wheat grains with such plant oils. Mortality increased with increasing
of both concentration and exposure period. The most effective oil was camphor (LC50
= 0.84 and LC95 =2.85 ml/Kg wheat), followed by the celery oil (LC50 = 0.89 and
LC95 =3.84 ml / Kg wheat) and garlic oil (LC50 =1.27 and LC95 =10.81 ml / kg). All
oils at LC50's caused a significant decrease in the mean number of eggs laid by
females as compared to the control and completely inhibited adult emergence.