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Foreign Grain Beetle Facts & Information

Protect your home or business from foreign grain beetles by learning techniques for identification and control.

Foreign Grain Beetle Illustration
Ahasverus advena (Waltl)
Reddish brown
2 to 3 mm
Rounded projections on shell


How do I get rid of foreign grain beetles?

What You Can Do

Controlling foreign grain beetles begins with a thorough inspection. Throw away food that the beetles have infested and eliminate any moisture problems. This will get rid of any mold or fungus that the beetles might have been eating.

What Orkin Does

Your local Orkin Pro is trained to help manage foreign grain beetles and similar pests. Since every building or home is different, your Orkin Pro will design a unique beetle treatment program for your situation.

In some situations, insecticide may be necessary. Liquid or dust insecticide can be effective in cracks and crevices beneath baseboards, while dust insecticide is effective inside wall voids.

Orkin can provide the right solution to keep foreign grain beetles in their place and out of your home or business.

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Frequently Asked Questions

Behavior, Diet & Habits

Understanding Foreign Grain Beetles


  • Color: They are reddish brown in color.

  • Size: The adults range in size from 2 to 3 mm.

  • Characteristics: When viewed from above, the shell behind the head has rounded projections on the front corners. These projections may be easier to see with a magnifying glass.


While foreign grain beetles are known to infest grain storage facilities, they commonly inhabit a variety of places such as:

  • Damp walls

  • Forgotten food packages

  • Humid bathrooms


The foreign grain beetle is a scavenger, with a typical diet consisting of:

  • Dead insects

  • Fungus

  • Moldy grain


The female beetle lays eggs on food material in a warm and humid environment. The life cycle, from egg to adult, takes about three weeks.

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