Many situations in which agricultural products are mechanically conveyed
during food processing offer the opportunity for control of insects by shock,
abrasion and impaction. The principle was developed over 70 years ago
for use in the fl our milling industry (Cotton and Frankenfeld, 1942 ) and
machines such as the Entoleter became a routine fi xture in fl our mills. In
the Entoleter, fl our falls between two rapidly spinning discs. Centrifugal
force pushes the fl our to the edges of the discs where it impacts a row of
steel pegs mounted on the rims, and is thrown against the outer steel casing
before falling into the basal receiving hopper. The material passing through
the Entoleter thus encounters two major impactions and this is responsible
for the control of all free living insect stages