Confused Flour Beetle (Also see Rust-Red Flour Beetle)
Granary Weevil (Also see Rice Weevil)
Mediterranean Flour Moth or Mill Moth
Red-legged Ham or Copra Beetle
Rice Weevil (Also see Granary Weevil)
Rust-Red Flour Beetle (Also see Confused Flour Beetle)
Tropical Warehouse or Almond Moth (Also see Warehouse, Tobacco or Cocoa Moth)
Warehouse, Tobacco or Cocoa Moth (Also see Tropical Warehouse or Almond Moth)
Appearance
Adult : small, dull reddish-brown, 2.5-3.5mm long, good flier (S. oryzae); 3-4.8mm, shining reddish-brown to black, flight-less (S. granarius). Larvae : legless, creamy-white with brownish-black head, hump-backed, (S. oryzae); legless, white with dark head, hump-backed (S. granarius).
Life Cycle
Eggs laid on grain surface. Larvae bore into grain and emerge as adults. Life span of adult is up to 5 months (S. oryzae), up to 9 months (S. granarius).
Notes
At first glance, both beetles look similar (adults as well as larvae). They can be distinguished by the four faint-reddish to pale yellow marks on the wing-case on S. oryzae which is absent on S. granarius. They are internal feeders (larvae feed inside the grain) and attack all kinds of grain and grain products, though S. oryzae is more prolific.
