Efficacy of certain plant oils as grain protectants against the rice weevil,Sitophilus oryzae (Coleoptera: Curculionidae) on wheat

Document Type : Original Article

Authors

1 Faculty of science, Entomology Department, Ain Shams University

2 Plant Protection Research Institute, Stored Products Department, Agriculture Research Center

3 Faculty of science, Entomology Department, Ain Shams University.

Abstract

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.

Keywords

Egyptian Academic Journal of Biological Sciences. A, Entomology
Volume 5, Issue 2
August 2012
Pages 49-53

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