I discovered borer in my garden. I drenched with Bayer product this spring but got them anyway.
I have newbies just planted the past 2 weeks.Perennial person at local nursery wasnt enthustiastic when I asked her what could be done to protect the new iris. She sold me a Bonide granular systemic product I sprinkled on all irises including the one I dug that was infected.
Her best advise was to drench in the spring. The borers love clay soil which is what we have.
Any more input on this topic would be appreciated. A DG'er said it takes years to eleminate the borer. Guess its an ongoing process.
