These backyard irises were damaged when husband cut his corner too close and ran them over with the lawn mower. Know that many of the rhizomes were damages and did die, however some were not as badly damaged and did respond to the immediate care that I gave them.
I also treated the garden bed with neem oil extract for spider mites. I used a concentrated formula that you mix with water and spayed the soil at dusk because it is not good to use neem oil in the direct light.
Granted a few flowers are still struggling to survive and 10 have turned brown and died due to the shock of the lawn mower. I have not given up.
Know that my neighbor has tossed his irises that have had borers into the woods, thinking that they were hopeless and they have survived. We now have wild irises blooming in the woods in the spring, so anything is possible.