Return to the Iris Forum | Post a Follow-Up

Iris borer control....

Posted by carolmac3 5 (My Page) on
Wed, Jul 10, 13 at 9:53

I have numerous beds of bearded iris, some of which have been attacked this year by iris borer.
I have started lifting and cleaning them.
My question is: How do I treat the soil so that I can replant them in the same beds?

Follow-Up Postings:

RE: Iris borer control....

I don't live in a borer prone area, so I am not the best person to answer this. What I have heard is that Bt used on the plants early on can help control them. Also there are predetory nemetodes that can be used when the larvae are out of the rhizome and going into the soil for the next step in their development I think. Some people have used imidicloprid (a systemic insecticide) in the spring. I am not sure about what kind of soil treatment there is other than keeping the dead foliage cleared away in the fall and winter.

Here is a link that might be useful: Page on borer control

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Iris Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here