What to do about beetle infestation of wheat products? How do we prevent reinfestation? Today my wife went to make some bread. She noticed some very small insects in the whole wheat and regular flour. Upon further inspection, many of our wheat based products were infested with these critters. The worst infestation was in some buckwheat noodles that looked like swiss cheese.

The bug looks like a dark, barely visible beetle. Maybe about half a centimeter in length. They seem to be depositing a powder everywhere. Maybe this is just flour they've carried around.

What are these guys? How do we get rid of them? How do we prevent them from coming back?

Link to picture:
http://web18.twitpic.com/img/146355240-133d33091a2b839fc9d4fb35402c0cea.4c686a68-scaled.jpg
Ugh, I feel for you!  Just based on the description, it's probably some type of flour beetle (normally either red flour beetle or confused flour beetle -- but check on wikipedia for pictures).  I'm no exterminator, but I've dealt with infestations of both in my pantry.

The only thing that I've found that works is to go through all food stored in the pantry (including that in sealed packages) and make sure that you throw out anything that is infested.  I'm not sure how you feel about chemicals, but at this point, I bug-bombed the house.

After you're sure that you no longer have an infested food, seal everything in plastic food storage containers.  In theory, that should contain any further infestations to a maximum of one container.

The other thing that I've done is to store as much of my dry goods as possible in the fridge/freezer... so stuff like flour is now stored in a sealed container in the back of the fridge.

My exterminator has said that a lot of times the beetles come in a package from the grocery store (a couple beetles in a box of pasta, for example) and they just overrun/overpopulate as much as they can.