Hello all. I just had to remove every single Iris on my property due to this borer. I had never, in my life, EVER had any problems with my landscaping, so when I decided to try and figure out why my Irises appeared to be dying, I was shocked to find this ugly critter and the destruction left in its wake (see attached - it used to be a thriving 28' x 3' bed of lavender irises). Frustrated, I dug up every single iris, regardless where it was planted, because of the sheer destruction of just one iris bed (I have four other locations on my property). I noticed only about a three foot long patch that had not yet been hacked, but I dug those up, too, for fear there was already initial damage done to the fans.
It's now August, and I realize this is my own fault for neglecting my landscaping to the point that this was my only option.
My beds are empty. What can I treat them with to prevent any pupae or residual eggs/larvae from surviving without their food source?
