Tribolium castaneum

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Tribolium castaneum (click on image to enlarge it)
Author(s): Peggy Greb, USDA Agricultural Research Service
Source: IPM Images

Tribolium castaneum (Herbst, 1797) - (red flour beetle)

The beetle is a cosmopolitan storage pest of flour mills, grain and other stored products, mainly in warm and tropical regions. It is possibly native to southern Asia. It is frequently introduced into Central Europe, but cannot survive cold temperatures. Mainly broken and damaged grain is attacked. For control, fumigation, controlled atmosphere, high temperatures (60° C) or diatomaceous earth formulations are used. Household goods can be disinfested by freezing them for 24 hours. The life cycle from egg to adult lasts around 1-3 months, depending on the temperature.

Vernacular names
• Deutsch: Rotbrauner Reismehlkäfer
• English: red flour beetle
rust-red flour beetle
• Español: gorgojo rojo de la harina
tribolio castaño
• Français: tribolium rouge de la farine
petit ver de la farine
• Português: gorgulho-casatanho-da-farinha

The adult is around 4 mm long and reddish-brown in colour. It flies readily and can be monitored with pheromone traps. It is closely related to Tribolium confusum which has a similar biology and appearance. T. castaneum can be recognized by the antennae having a 3-segmented club, clearly wider than the rest of the antennae. In T. confusum the antenna gradually increases to a 4-segmented club.

Colydium castaneum
Tribolium ferrugineum
Tribolium navale

For details see the respective page in BugwoodWiki.