sedum pests

[carolina mtn gardener]

I need help identifying a pest*infestation I found on our autumn joy sedums.* Several stalks have been hollowed out and replaced with what looks like red mud...similiar to*a mud dauber's nest.** When I broke the stalk open, small white insects were inside...they had no wings or antennae but had mandibles.

[Newt]

Hi Carolina Mtn Gardener,

I'm not finding much info on insect pests and sedum.* You obviously have the larval stage of some pest.* I do find reference to black vine weevils, but the feeding habits of the larvae are to feed on the roots.* The adults do notch the edges of the leaves of plants, often making them look scalloped.* Do you see anything like that?
http://www.agnr.umd.edu/MCE/Publications/PDFs/FS805.pdf

Here's a root weevil grub on a sedum.
http://www.entomology.wisc.edu/insec...t_info.php?369

Here's the damage.
http://www.entomology.wisc.edu/insec...t_info.php?370

I would definitely cut off the stems of any infected plants and destroy them.
Newt