Stem borer (Coleoptera: Curculionidae) in Bidens

An adult of this weevil emerged from the lower end of an 11" piece of stem that I had been keeping in a rearing container because I had discovered a Lepidoptera larva (apparently Epiblema otiosana, record 0096) tunneling in the upper end. I collected the stem on 25 July and the adult weevil emerged on 03 September. In a review of my notes from that rearing, the fate of the caterpillar from the same stem was unclear.