If you open a sack of flour and find bodies of dead weevils, this is a sign of

The presence of dead weevils is the sign of physical contamination in the flour. This may occur due to improper storage of the flour. Storage at inadequate temperature may lead to the growth of weevils and hampering of storage container may provide access to the weevils.   This may be avoided by maintaining proper hygiene in the storage of the flour.