Just an update from last year. Apparently, they will attack any type of iris of rhizome plant. I almost lost my Toad Lily. I noticed it never bloomed and that it was looking very yellow. Well, I decided to dig it up and see what the issue was and guess what? - 2 big borers were eating through the rhizomes and had destroyed nearly the entire plant. I was able to save only 2 small rhizomes and will be planting them again soon. I dug out almost my entire Iris bed this year and killed a couple of skinny borers and tossed out the old original rhizomes. I did not find that many though. I didn't think they would attack another type of plant...I will probably not have any blooms next year, and will probably give up on my Iris bed as it is a lot of work.
