Thanks, Daisy. I don't use imidacloprid on my irises because I know it is systemic, which means it can be carried into the blooms and therefore may affect pollinators, so I've wondered why it would be labelled for control of iris borer. I just made a quick look at various imidacloprid labels and have been unable to find iris borer listed. I know others on the forum use it: anyone want to comment? Is there a specific imidacloprid product labelled for iris borer?
I think somewhere I read that the new iris cultivars are hard for insects to pollinate, so maybe there is less concern in that regard.
