Re: Scorch

Linda,

I had TERRIBLE problems with scorch in Minnesota. I lost hundreds of 
dollars of iris of all kinds, even Louisianas, which are supposed to 
be resistant. No one organism has been identified as the causal 
organism, though a few have been ruled out, Pseudamonus, as I 
remember, being one of them. Julius Wadekamper has written a few good 
articles in former issues of the Bulletin, and I've seen at least one 
paper in HortScience, from the American Society of Horticultural 
Science.

Scorch seems to start always with necrosis in the center fan, 
spreading every where. The rhizomes remain healthy in appearance, but 
do not root. Some people remove them, soak in a mild clorox solution, 
treat with rootone, and replant in clean soil. I had no luck with 
that. In MN, I was on heavy, poorly drained soil, and even in raised 
beds, the iris stayed too wet. I think it is a syndrome, tightly 
linked to stress, probably aggrivated by a few organisms, but linked 
to none specifically. There seems to be no cure, though after a few 
years, some rhizomes do come back if babied enough. All in all, it's 
a sad disease/stress syndrome.

I hope someone else has more positive information. I'd sure like to 
hear it!

regards,
Steve
J. Steven Brown              Mt. Gretna Gardens      
                             Iris and Daylilies.                               
2493 Pinch Road
Manheim, PA 17545-9466
USA                     Internet:jsbrown@redrose.net
(717) 664-4066          Homepage:"http://www.success.net/
  fax 664-5081                                 mggarden/"
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