Ethanolic extracts of five plant material from Eucalyptus gluaca, Melia azadrach, Mentha arvensis, Olea europaea leaves and periearp of Punica granatum were investigated for insecticidal activity against the confused ...Ethanolic extracts of five plant material from Eucalyptus gluaca, Melia azadrach, Mentha arvensis, Olea europaea leaves and periearp of Punica granatum were investigated for insecticidal activity against the confused flour beetle Tribolium confusum DuVal in the laboratory. Different concentrations 2.5%, 5%, 7.5%, 10% using filter paper test were implemented in the experiment. Mortality was assessed after 24, 48, 72 hrs of treatment and LDs0 were calculated at respective time intervals. Data analysis was made by using factorial Complete Randomized Design （CRD）. The results revealed that all of the tested materials with some variations had lethal effects against the pest as compared with the untreated check. The time 24 h showed higher insecticidal effect with the tested concentrations for the larvae and adult of Tribolium confusum. Strong toxicity effect was observed at concentration 5% of M.. arvensis for adult followed by E. gluaca, O. europaea, M.. azedrach and P. granatum. For larval stage the extract of O. europaea and E. gluaca with concentration 7.5%, 1%, respectively caused high mortality followed by M. arvensis, M. azedrach and P. granatum. The LDs0 values for adults and larvae were calculated to be 1.33 and 1.42 with M.. arvensis and O. europaea, respectively.展开更多
文摘Ethanolic extracts of five plant material from Eucalyptus gluaca, Melia azadrach, Mentha arvensis, Olea europaea leaves and periearp of Punica granatum were investigated for insecticidal activity against the confused flour beetle Tribolium confusum DuVal in the laboratory. Different concentrations 2.5%, 5%, 7.5%, 10% using filter paper test were implemented in the experiment. Mortality was assessed after 24, 48, 72 hrs of treatment and LDs0 were calculated at respective time intervals. Data analysis was made by using factorial Complete Randomized Design （CRD）. The results revealed that all of the tested materials with some variations had lethal effects against the pest as compared with the untreated check. The time 24 h showed higher insecticidal effect with the tested concentrations for the larvae and adult of Tribolium confusum. Strong toxicity effect was observed at concentration 5% of M.. arvensis for adult followed by E. gluaca, O. europaea, M.. azedrach and P. granatum. For larval stage the extract of O. europaea and E. gluaca with concentration 7.5%, 1%, respectively caused high mortality followed by M. arvensis, M. azedrach and P. granatum. The LDs0 values for adults and larvae were calculated to be 1.33 and 1.42 with M.. arvensis and O. europaea, respectively.
