Re: CULT: lethality of rot
- Subject: Re: CULT: lethality of rot
- From: Linda Mann l*@volfirst.net
- Date: Tue, 06 Aug 2002 09:24:56 -0400
I always let rot run its course here - if the cultivar succumbs, I don't
want it to be part of my hybridizing efforts. I have found that either
soft rot kills the entire clump or is self-limiting. Part of the clump
rots, the rest recovers with no treatment other than removing dead and
dying leaves, if I notice the rot.
A few years ago, one of the list members did some experiments with rot
infested plants, treating some and leaving some to recover on their
own. Not surprisingly, they found that the greater damage to the
untreated plants set them back in subsequent growth and bloom.
In my garden, rot seems to be most likely to occur in susceptible
cultivars when plants are stressed - hard freezes while plants are
actively growing, drought, drought followed by a lot of rain, rain in
hot humid weather, etc etc. Because of this, I thought that rot wasn't
exactly an infectious agent, just an opportunistic decomposer of dead
and dying iris tissue, but others have convinced me that it more likely
attacks & kills weakened tissue.
FWIW
--
Linda Mann east Tennessee USA zone 7/8
American Iris Society web site <http://www.irises.org>
iris-talk/Mallorn archives: <http://www.hort.net/lists/iris-talk/>
iris-photos/Mallorn archives: <http://www.hort.net/lists/iris-photos/>
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