Are there any treatments for borers that won't hurt the bees? I've never had borers before this year, and just found a bunch of the big, fat, disgusting things this morning. I wondered why so many of my iris weren't thriving this year, and chalked it up to our sopping wet spring and clay-like river bottom soil. I lost so many of them, it just breaks my heart! I decided to dig up some of my bigger clumps to see if they needed divided, or had rot, or what the issue was, and found so many hollowed-out rhizomes with ugly borers in them. I have tons of iris all through my yard, not in one centralized location, so trying to treat them all is going to be a major undertaking. They are my dearly beloved favorite flowers, though, and I don't think I can bear to lose them!
Any recommendations for me? Is it too late in the season to successfully treat for them? It sounds like most of the experienced people here did it in late spring.
