A Study of the Effects of some Water Plant Extracts on the killing Rates of the Two insects Trogoderma granarium Everts Dermestidae : Coleoptera and Oryzaephilus surinamensis (L.) Silvanidae : Coleoptera

Abstract

           This study was conducted to show the effects of some water plant extracts of leaves of the plants, Myrtle Myrtus communis L. , Rue Ruta graveolens L. , Rosemary Rosemarinus officanalsi , Basil Ocimum basilicum and  Mint Mentha piperita L. with the concentrations 1, 4, 7, 9 % on calculating the death rates of both Trogoderma granarium Everts and the adults  of Oryzaephilus surinamensis (L.). It was found that the concentrations 7% and 9% of M. communis and the concentration 9% of R. graveolens gave the highest average of death rate for the larvae of T. granarium which was 100%. The concentration 7% of  R. graveolens extract and 9% of M. piperita gave high death averages to be 96.67 and 93.33% respectively. The relative average was 1000 for R. graveolens and was 285 for M. piperita. The insect T. granarium recorded the concentrations 7% and 9% for the extracts of M. communis , R. graveolens and M. piperita with high death average rates to be 100%. M. piperita and R. graveolens gave the highest efficiency rates which were 883 and 662, while the extract of R. officanalsi recorded a lowest death rate to be 100 % for each of the two insects T. granarium and O. surinamensis