Thanks everyone. That did help, it was indeed a borer pupa. Right now we see both the larvae and the pupa. I like the idea of making a moth trap though. Up until this year, the damage I experienced was minimal. But the area where I grow my seedlings (figures!) experienced explosive growth this year, enough so that I will have to really ramp up preventative measures. Next year I will treat everything with Merit. Unfortunately I can not burn in this location as that would help too. In general everyone in this area is reporting a lot of borer for the year : (
For now, I soak everything that comes out of the affected area for at least 15 minutes. Those nasty little critters can not swim!
zone 5 NE