Bioactivities of Essential Oils from Basil and Sage To Sitophilus Oryzae L.

ABSTRACT

The biological activities of essential oils from Ocimum basilicum L. and Salvia officinalis L. against Sitophilus oryzae were investigated in the laboratory experiments. Contact toxicity (applied essential oils on filter papers), grain treatment for mortality and repellency assays, and also effect of oils on insect fecundity were obtained during four weeks. Only the most concentrated solutions of essential oils (2 %) of both plants caused the significant mortality, repellency and anti-reproductive effect. All grain-protective properties of essential oils were concentration- and time-dependent. Insecticidal effectiveness of applied oil's solutions on the grain surface was similar as on filter paper; repellency of the most concentrated oils was significant, but their effect in reduction the F1 progeny was the most striking.