Re: CULT:Scorch


 Have never witnessed iris scorch, but from researching the Web, I would tend to agree with your conclusion.
The Region 18 pages says this, "leaves at the center of the fan begin to die at the tips, but can't be pulled free of the rhizome. Scorch begins with withering of the central leaves and within a few days the leaves turn a rusty red-brown, beginning at the tip and spreading down toward the base. Soon all leaves are affected. When affected iris is dug up, the roots, not the rhizome are dead and hollow."
Researching the Web, learn there is an AIS Bulletin article by Guy Rogers in Volume 133 , pg. 38
The cause(s) of iris scorch is(are) not known, but to save the plants, dig the rhizomes immediately and store them in a warm, dry location until fall, then replant, because the rhizome is not affected.
Iris scorch may be a symptom of insect and disease problems that interrupt the flow of water to the roots. Root diseases may reduce root efficiency so that less water reaches the leaves, which, then scorch.
Iris scorch is a non-infectious disease that may occur at any time during the growing season, but most commonly in early summer. If dug up the iris should survive, however it may not bloom the following year.
Iris scorch is often associated with drought conditions; during hot, dry weather, water loss from the leaves occurs faster than the plant is able to take up water from the soil. However, scorch may result from other factors such as herbicides, high salts, and excessive fertilizer.
Thank you for asking the question, try to manage this iris garden proactively. While never having iris scorch it seems to be a faster occuring situation than normal leaf decaying symptoms that occur right after bloom season and again in the late fall. I can remove these leaves from the rhizome, whereas if the symptom was iris scorch I could not.
For further information go to: www.google.com  <click> on advanced search,  in the exact phrase box, key in the words IRIS SCORCH, then <click> on the Google Search Button. Hope that answers your question, now if I could only figure out why the sender of this reply reads Foley Martin instead of Martin Foley.
Martin Foley, Birmingham Mi. Zone 5 , 75 sunny no humidity, not a cloud in the sky
 
  Debi Schmitt <otisbird@fix.net> wrote: >They don't dry up they DIE out. 
>Almost like a very high heat was taken to the plant
>causing them to scorch

What I got from the page(which was very informative) was with scorch the
iris dies starting with the inside leaves.  With normal dye back it's from
the outside leaves.  Now, is this correct?
               .---.__
              /  /6|__\
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              /  \\           debi
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  jgs  /`

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