Insecticidal and repellency effects of a Turkish diatomaceous earth formulation (Detech) on adults of three important pests of stored grain

In this study, laboratory experiments were conducted in order to assess the insecticidal and repellency effects of a novel Turkish diatomaceous earth (DE) formulation (Detech) on adults rice weevil, Sitophilus oryzae (L., 1763) (Coleoptera: Curculionidae), confused flour beetle, Tribolium confusum du Val., 1863 Tenebrionidae), lesser grain borer, Rhyzopertha dominica (F., 1792) Bostrichidae). For activity, bioassays with soft wheat treated 0, 600 900 ppm Detech at 25 ± 1°C 65 5% RH progeny production was assessed after 45 days. tests, two-choice tests mono-layer 1,000 RH. Overall, effective against T. S. wheat, causing 82% 100% mortality 7 14 days exposure. The complete, or almost inhibition found both concentrations, whereas highest reduction R. (84%) obtained ppm. highly moderately repellent adults, respectively, it had no low effect adults. conclusion, Detech, which consists mixture three DE deposits different diatom frustules has potential for use stored-grain insect pests as promising protectant. Experiments 2020-2021 Entomology Laboratory Tekirdağ Namık Kemal University Kahramanmaraş Sütçü İmam University.