Marion!
There was a thread called Iris Borer that was started about 7 months ago. If you scroll down the iris forum list you will find it. They are horrid little things. In about a month from now, the best thing you could do as a preventative measure is to spray your iris gardens with grub control, such as Bayer Grub Control. It is used for lawns, but works well for borer control too. The sprayed area is covered for up to 6 months. There are other measures too, but I think you will find them on the thread.
