Pantry Pests

Recently, two insects have been grabbing the headlines as their presence has been noticed: bedbugs and stinkbugs, and deservedly so. However, they have lots of company. With the nicer weather coming to a close, you will be spending more time indoors. You may start to see “flyers and crawlers” all sorts of other insects in your house. The most common are grouped together and called pantry pests.

Two important steps should be taken to manage them. First, don’t panic. What you see may not be as serious of a threat as bedbugs. Plus they are not always associated with unsanitary conditions. Most of these insects have hitched a ride in packaging material, boxes, and containers. Secondly, in order to solve the problem, the insect must be identified correctly. Please do not spray an insecticide as a first response. They are poisonous, and anything sprayed indiscriminately can contaminate food, containers, preparation surfaces, and pet areas. There may be safer ways to control pantry pests.

The most common insect pantry pest in Pennsylvania is the Indian meal moth. It prefers such foods as chocolate, dried fruits, bird feed, and dry dog food. A common flour, pasta and cereal pest is the saw-toothed grain beetle. Various other species of beetles are also common pantry pests and infest a wide variety of food items. Cigarette beetles and drugstore beetles are occasional pests, but they prefer dried plant materials such as herbs and spices. You may also come across carpet beetles, which feed on lint, hair, leather, and animal products. Larder beetles live on other dead insects, corn meal, and dry pet food.

The key to successful control is to find the source of infestation. Unless this is found, you will continue to see the insects. Finding insects in one area of the home does not mean the infestation is in that area. Many cereal pests can fly; therefore, you may see them in places distant from their breeding site. Pantry or stored product insects can feed on anything edible: cereals, various grains, crackers, spices, macaroni, dried fruit, chocolate, candy, nuts, dried peas or beans. Don't overlook pet foods such as bird seed, fish food, dog food and cat food.

Once you locate and eliminate all infested foods, the number of pests should decrease rapidly. Those you see will be adult beetles or moths looking for another food source in which to deposit their eggs. Store all pantry items in air-tight, hard plastic containers, jars, etc. Be sure to check cake mixes and other unopened items because they might also be infested. Thoroughly vacuum and wash cupboards, pantry shelves, floors, etc. to remove any spilled food stuffs. Insecticide sprays are of little value in controlling pantry pests when infested materials are removed and cracks and crevices are cleaned.

We have two publications to help manage pantry pests, ‘Identifying Common Household Pests’ and ‘Cereal and Pantry Pests’. Contact the Penn State Master Gardeners in Lackawanna County at 570-963-6842 or LackawannaMG@psu.edu for a copy.


Steve Ward
Master Gardener Coordinator
Penn State Cooperative Extension in Lackawanna County