Broadhorned flour beetle
Gnatocerus cornutus (F.)
Secondary pest: grain feeder
- Adult males and females differ in appearance.
- Both genders are reddish brown and shiny, but females lack the horns found on males.
- Flour, meal, dried cereal and animal products
- Rice, maize, oil containing seeds, peanuts and cocoa beans
Signs of infestation
- Disagreeable odour in the commodity
- Large numbers indicates of broadhorned flour beetles indicates old stores of poor quality
- Prefers to feed on the protein-rich outer parts and starch of cereal grain
- Does not cause distinctive damage
How to control
- Is distributed worldwide
- Has been found across Canada
- Prefers flour and meal
- Is a minor pest of cereal and animal products
- Is reported mainly in flour mills and warehouses
- Is only able to survive winters in heated buildings
- In Canada, females lay eggs amongst the food.
- Larvae hatch and move freely among the food, feeding.
- Adults are relatively long lived (7 to 12 months), feed and are able to fly.
- This species is partially predatory, feeding on living and dead insects, as well as other animal protein sources when available.
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