Originally Posted by robguz24

Yes, it sounds like weevils. From what I understand only pretty awful chemicals, which may not even be legal in many areas for a home gardener if at all. Some have suggested using neem pellets or powder. I've also read that you can put sand around the base of the corm. Diatemaceous earth may help, but as soon as it gets wet it's useless. What I do is every time I cut down a plant, I cut the p-stem into foot long chunks, split them, place them split side down near the corms, then check daily for weevils and crush them. Doing this consistently, over time the number of weevils I find has dropped, and there seems to be less clear damage when I initially cut off the p-stem. The problem seems to be having enough p-stems available to use as weevil traps.