As with other pantry insects, it is the larvae doing the most damage for these species, yet it is the adult that is most commonly found by consumers. There is a very slight difference in appearance between these two insects, but the Merchant Grain Beetle flies and the Saw-Toothed Grain beetle does not. Control of these insects involves inspection and removal of infested food products. Remember to check even closed packages. Vacuuming the corners of shelves using a crevice tool is also suggested followed by sealing and disposing of the vacuum bag.
Many people express concern about applying insecticides where food or foodstuff is stored.
We have explained that sprays are applied selectively to corners only, that sprays are permitted to dry before any food products are returned and that food products are virtually always in containers and don't actually contact treated surfaces. Even with plates and dishes, only the bottom of these items touch the treated areas. Please read our commentary, Pesticides and Safety , for more information.