Re: TB: Rot Question

Matt:

Most people recommend liquid bleach or Ajax (same thing) powder.  For me,
bleach seems to prevent new roots from growing.  After scraping out ALL the
infected tissue, cauterize the wound by dusting with (or better yet, rubbing
in) mortar mix, stucco mix, or lime over all of the exposed surface.  This
seems to limit the spread of the rot better for me, and has little or no
effect on the overall vigor of the remaining plant.

Of course, do you really want to listen to the advice of

lamegardener@msn.com
John Reeds, southern California
  ----- Original Message -----
  From: Matthew Booker
  To: iris@hort.net
  Cc: apetala2@yahoo.com
  Sent: Monday, April 03, 2006 6:26 AM
  Subject: [iris] TB: Rot Question


  I am a new iris-grower, and I planted about 40 or so
  varieties in my garden late last summer. This spring,
  I noticed that the following are either dead or dying:

  Fogbound
  Collete
  Mother's Little Helper
  Megabucks
  Banana Frappe

  They all have the same symptoms. They had started to
  put out shoots, then the main shoot/fan whithered and
  then the side shoots/fans started die usually browning
  at the base first and then dying. If I gently press on
  the top of the rhizome, I can feel that it's soft.
  Irises that do not have these symptoms feel firm. I
  haven't detected any smell, but they're clearly have
  rot.

  All my irises (both those w/ symptoms and w/o) started
  to grow early this February because of the mild winter
  weather. Then, we had very cold, below normal weather
  for the rest of February and much of March. I suspect
  that may have to do with the problem, but I am not
  sure. I have irises w/ symptoms and w/o in the same
  beds, so it's not an obviously location-centric
  problem.

  Any thoughts/ideas/advice?

  -Matt
  Eastern Mass, Zone 6

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