We had a time with those this summer, I’ve never had them before! The adults do not eat–the larvae feed on grains and starches. You need to throw out every single thing with larvae in it. Then you have to go to extreme measures to freeze, double bag or tightly seal ANYTHING. We found larvae in rice, pasta, wheat, corn, cornmeal, flour, oats . . . and even under the rim of a spaghetti sauce jar. Keep everything in the kitchen scrupulously clean—all possible spilled flour on the shelves, etc. Kill all the adults you can, to minimize egg laying. You can try the gum, I didn’t know about that. You can also try to trap them. A light right over a can of water can get them to fall in. Menards here sells traps that are safe–a pheromone to attract them to the little cardboard trap, where they get stuck in glue. It took us two months to finally get rid of them, and even now I’m afraid to bring up wheat–I’ve been keeping it in the freezer. Very inefficient! But the things drove us nuts.
I know of other families who have had trouble, just this year, and not before. I wonder if we all aren’t bringing something home from some supplier who has them.
