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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
  • Date: Sun, 8 Feb 1998 08:30:50 -0700 (MST)

I  also have a big problem with leaf spot. I work hard at keeping the =
leaves trimmed but never seem to wipe it out, or even get ahead. Weather =
does appear to play a big part of the problem. Iris look nice untill we =
have lots of wet humid days.Will starting keeping notes on the varieties =
 most affected.
Judy Eckhoff
Yoder, KS. zone 7
From: 	Dorothy Fingerhood[SMTP:daf10@cornell.edu]
Sent: 	Sunday, February 08, 1998 12:06 AM
To: 	Multiple recipients of list
Subject: 	RE: Leaf Spot: Gene, Culture, Location, Gardener

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 =
>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 =
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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