Re: TB: Rot Question

--- Matthew Booker <apetala2@yahoo.com> wrote:

<< > 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: >>

Matt, 
At least one of the respondents to your post mentioned
Botrytis rot, which is an annual problem here that
becomes apparent when the snow cover melts, which it
has just done. If this was your problem, there should
have been some sign of fuzzy, blue-gray mold growth on
the surface of the affected rhizomes. Botrytis causes
the infected rhizomes to go mushy abd the foliage to
turn brown, but does not produce the foul odors
associated with soft rot (a warm season problem).
Others have already mentioned the treatment methods
you might employ. Regardless of what you do, if the
cause of your problem is Botrytis, it will cease its
depredations until next winter as soon as the
temperatures reach and remain above 40-45 degrees.

With a little help from Botrytis it appears that
DECADENT lived up to its name here this winter.  

Jeff Walters
in northern Utah
(USDA Zone 4)
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