Subject: Tenacious ”grain” beetle
Location: Columbus ohio
September 21, 2013 5:10 pm
We cannot make these go away! We clean and toss everything and they come back to our kitchen pantry. As it happens we are getting new cabinets and do not want to see them on our new shelves!!! Help
Signature: Beetle mania
Dear Beetle mania,
We believe this is most likely a Merchant Grain Beetle, Oryzaephilus mercator, but we would not discount that it is the closely related Sawtooth Grain Beetle, Oryzaephilus surinamensis. Both species of Grain Beetles have similar habits, and according to BugGuide, they feed upon: “larvae and adults feed on damaged kernels of stored grains: barley, oats, rice, sunflower seeds, and wheat, plus flour, pasta, breakfast cereals, cake mixes, and various other processed foods.” If you cabinets are very old, it is possible that over the years, flour and other pantry items have spilled into cracks and has filled nooks and crannies in the cabinetry that is sustaining a population of Grain Beetles even if you have discarded all items that might be feeding them. Hopefully replacing the cabinets will solve your problem.
We certainly hope so, thank you so much!