Effects of processed kaolin clay on adult mortality and progeny production (F1) of two stored product pests

The insecticidal effect of processed kaolin (Sepidan®) and its influence on progeny production (F1) of Tribolium confusum (Coleoptera: Tenebrionidae) and Oryzaephilus surinamensis (Coleoptera: Silvanidae) were investigated under laboratory conditions (25±1C°, 65±5% R.H, in dark). Seven to 10 day old of each species were exposed to kaolin at five concentrations (1000, 2000, 3000, 5000 and 10000 ppm) and their mortality was recorded after 3, 7, 15 and 30 days, at three replicates, separately. The results showed that mortality of adults increased significantly as the concentration rates and exposure duration increased, (p