I have to add my 2 cents worth since I just destroyed a couple of borers in my garden yesterday. I was checking my plants after I had dug up and replanted all my irises 2 weeks ago. Thought all would be good as I dug deep and amended. I saw some tell tale rotted type of mess on a few leaves of increases. I cut with a knife to sever the increase and there is the borer eating his way into the main rhizome!! Beheaded both and the roots of the increases look good so I replanted. I thought July was too late for them to be still moving in but I guess not!
