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RE: Leaf Spot: Gene, Culture, Location, Gardener

  • To: Multiple recipients of list <iris-l@rt66.com>
  • Subject: RE: Leaf Spot: Gene, Culture, Location, Gardener
  • From: Dorothy Fingerhood <daf10@cornell.edu>
  • Date: Sun, 8 Feb 1998 08:06:35 -0700 (MST)

At 06:27 AM 2/8/98 -0700, Walter wrote:
>	I was hoping more people would respond to the leaf spot thread
>regarding the items listed above.  If you have some time, give it some
>more thought.  If it is a gene that causes it, can this gene be
>identified /isolated in DNA testing and eventually bred out of lines that
>carry it?
>	Why is leaf spot more prevalent in different seasons, climate,

Walter, around here leaf spot is ubiquitous.  Some varieties show more
resistance than others, but darn near every fan on bearded irises sports
some spot.  If it's linked to a gene, I think the gene must be essential
for an iris to be an iris!

I do not spray.  I DO practice "clean cultivation" and trimming--sometimes
to extremes (time permitting).  However, anyone wanting to study the
problem will find ample material in my iris beds, no matter what I have
done, or what the weather has been.  Some weather conditions --humidity,
lots of rain, do seem to make it worse.
That's the view from my garden, anyway.

Dorothy Fingerhood
Newfield, NY

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