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Visual Reference Library - Insects
 IN-25.0 Red and Gray Sunflower Weevil

Tribolium castaneum (HERBST)


A slim beetle of 3-4 mm length, of uniform red-brown to black color. Beetles and larvae feed on a very wide variety of dry vegetable substances, such as, milled cereal products. A frequent mill pest; it can also attack undamaged wheat kernels.


Besides grain and grain products it infests foodstuffs and animal feeds of all kinds; also spices and drugs.


Badly infested flour has a sharp odor and turns brown; its baking properties are damaged.

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Last updated February 2010