STUDIES ON INSECTICIDAL ACTIVITY OF THE ESSENTIALOIL FROM Clausena dunniana AND ITS TOXIC COMPONENT

ResuIts of bioassays showed that the essential oils from Clausena dunnianawas very effective against stored product insects,Sitophilus zeamais and otherspecies.It caused 99.33 % of mortality and completely inhibited the reproduction ofred flour beetle(Tribolium castaneum)when was used for fumigation at a dosage of20 mg/L,or mixed with wheat flour at a concentration of 0.2% by weight.Estragole,the predominant component of the essential oil,was isolated by means of columnchromatography and proved to be the insecticidal component of this plant by aseries of bioassays.