University of Nebraska - Lincoln

Managing Pantry Pests

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Red flour beetles in a newly opened bag of flour Quick Facts:

Discovering "bugs" in your breakfast cereal may be disgusting, but it isn't unusual, because many insects like to eat what we do. Stored foods commonly infested include flour, cereals, cracked grains, baking mixes and processed foods, crackers, macaroni, cured meats, powdered milk, dried fruits, nuts, popcorn and spices. Insects that feed on these products may also infest other grain-based items such as pet foods, birdseed and ornamental corn. Dried flower arrangements may also be attacked.

Insect pests most often encountered in stored food products are:

• Indian meal moths
• dermestid beetles
• sawtoothed grain beetles
• cigarette and drugstore beetles
• flour beetles
• granary, rice and maize weevils
• bean weevils
• spider beetles

Several stages (egg, larva, pupa and adult) of these insects may be present at the same time in infested products. Because we keep our houses warm, these insects may continually reproduce and many stored product infestations can be found nearly any time of the year.

The first indication of an infestation is often presence of small brown beetles, moths or worms in cupboards or on counters. Upon closer inspection, insects may also be found in opened packages or containers of food and in the cracks and crevices of cupboards. Unopened packages may also become infested because some of these insects can readily chew into cardboard and foil packaging. Insects can be brought into the home along with infested food products. They can multiply and spread to other stored foods.

Once an infestation is suspected, identify the pest and try to locate the source. Occasionally, the source of an infestation can be very hard to find. It may be in an unopened package from the store. Consider the possibility food may have been spilled next to or behind hard-to-move appliances. Mice will sometimes collect seeds or dry pet food and hoard them in walls, under cupboards or dishwashers where the infestations are nearly impossible to find.

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Indian Meal Moth Adult

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