Evaluation of the effect of different concentrations of plant powders on the red Coleoptera:Tenebrionidae) Herbest (flour beetles Tribolium castaneum

This study was conducted to investigate the effect of different concentrations of some plant powders on some aspects of the life of the flour beetle Tribolium castaneum at 28 C° and humidity of 50%. The study showed that duration of the larval stage was 19 days and pupa duration was 5.4 days while the average age of adults was 119.5 days at brown flour, As for the determination of effective repellant concentrations of plant powders after two days and the killer concentrations of plant powder after a week of treatment for some plant′s powders the black pepper Piper nigrum , cinnamon Cinnamomum zaylancium , coriander coriander sativum and Syphilis Syzygium aromaticum in concentrations 0, 2, 4, 6 % The results showed that the powder of the black pepper plant was 6% higher than the effect of the repellent with an average expulsion of 8.67% on the rest of the plants with the same concentrations and an average of 8.17%, 8.00%, 7.17% for carnation, cilantro and cinnamon powder respectively. As for the assessment of the killer concentration after a week of treatment on the same plant powders the result shows Excellence of Pepper Black Pepper Powder 6% In the rate of homicide and in the rate 5.05% By comparison with 4.35%, 2.35% for powder of cloves, cilantro and cinnamon, respectively.