What's That Bug? does not endorse extermination

Subject: is this a pantry beatle?
Location: NJ
September 24, 2012 8:56 pm
About a year ago i found an infestation in my kitchen which i think came from a box of newly opened pasta.
I threw out most of the items on my counter along with all the bugs i found.
Every once in a while i would come accross a bug which i would then dispose of.
Recently i have noticed that my pantry (especially the places with chocolate has become infested. The only thing that truly seems to kill the buggers is crushing them with my finger or putting them in the freezer.
Based on other things i read on this website i believe that these may be pantry beatles. Can you tell if this is the case
Can you recemmond what might kill them? i have tried raid but have had limited success. Would bleach work?
Signature: Ricki

Merchant Grain Beetles

Hi Ricki,
We believe these are Merchant Grain Beetles,
Oryzaephilus mercator, and while they are often found in stored foods in the pantry, they are actually classified with the Bark Beetles.  According to BugGuide:  “Adults and larvae feed primarily on cereal products, particularly oatmeal, bran, shelled sunflower seeds, rolled oats, and brown rice(3); usually associated with oilseeds and less with cereal grains and in most regions damages processed cereals, especially those with high oil content; also feeds on seed-borne fungi.”  The best control is keeping a close watch on stored foods and disposing of anything that appears to be infested.

Merchant Grain Beetles

What's That Bug? does not endorse extermination
Location: New Jersey

6 Responses to Merchant Grain Beetles

  1. ourmagic2 says:

    If you place bay leaves around in your pantry the grain beetles will flee and never come back. You can by bay leaves in bulk at certain food chains or Richards Whole foods carry them.

    This was the only way I could get rid of the pesky things.

  2. Katie says:

    I have found these little black grain looking beetles but they haven’t been in my pantry. I found them in an old backpack that wasn’t used for about two years, and found chocolate broke into a fine power from their eating it and also they were in an old vitamin c drop they had burrowed holes in it and were living happily inside. I cleaned it all out but I still see them around; in the bathroom, bedroom, kitchen. However they aren’t in any rice or grain of any type, not even cereal. Not sure where they’re coming from or if they’re an adapted version. I would like to get rid if them forever but not sure how. Please help.

    • bugman says:

      Perhaps they are feeding on pet food.

      • Katie says:

        No pets/ no pet food. It’s like they’re looking for other things. Maybe the neighbors have them and they are finding a way into my apartment? If so I would really like to know how to get tried of them and deter others from coming.

  3. Gmm says:

    I have them too.
    They are basically growing!
    They get into everything!
    They started in a walk in closet in my bedroom and are just in things like .. a suitcase, or randomly in my bathtub, or sink in bathroom. I saw one in a candle o had in my kitchen. I’ve put around diatomaceous earth and I’ve seen it catch a few but nothing that I need to get all of them. I now saw two in my pillow! Help! I’m so clean and don’t see them feeding on anything …

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