The Addition of Inert Dusts on the Surface of Stored Grain to Protective it from Trogoderma Granarium Infestation.

Trogoderma granarium Everts 4 6. 52.09% 20.78% . %99.99 %92.58 6 . %58.62 6 . In this study, the effectiveness of eleven natural and synthetic inert dusts was tested against 3rd larval instar and adults of khapra beetle Trogoderma granarium Everts by addition of inert dusts on the surface of the grains and exposure the insect to it for 4 and 6 days.This study was showed that adult beetles where more affected than the 3rd larval instar, the general mean of mortality percentage was 52.09% for the adults while it was 20.78% for the larvae. Results showed that ninivite dust gave the highest mortality percentage to adults (99.99%), followed by silica gel (95.58) after 6 days of exposure, whereas silica gel dust gave the highest mortality for the 3rd instar larvae (58.62%) at the same period.