Rust Red Flour Beetle (Tribolium castaneum) are 3-4 mm long, flattened, reddish-brown with club-shaped segments on antennae ends. The larvae are elongate and light brown. They are a major widespread pest, though Is considered a secondary pest because it cannot damage sound grain. Mainly a pest of milled cereals and a common pest in stored cereal grain and processed grain products. Both larvae and adults are general feeders and the damage caused by them is not readily identifiable. A heavy infestation in commodities discolours grain and emits a foul odour due to a secretion from the abdominal glands of the adult.