Re: Re: CULT: rot-prone irises
- To:
- Subject: Re: [iris-talk] Re: CULT: rot-prone irises
- From: J* a* C* W*
- Date: Sat, 10 Feb 2001 14:47:50 -0700
> From: lfandjg@yahoo.com
> > However, several years ago our RVP
> > asked us to provide a list of the irises we grew that were most
> subject to
> > soft rot, and these are the ones I came up with: Gigolo, Juris
> Prudence,
> > Land O' Lakes, and Speculator.
>
> Which did these fall victim to, erwinia or botrytis?
Laurie,
These were varieties that seemed to be particularly susceptible to
bacterial soft rot (Erwinia).
In my experience, just about any TB can fall victim to botrytis. It is
insidious, as it usually takes hold while the rhizomes are still covered by
snow, so the infection is often well advanced by the time it becomes
visible. The usual techniques of scraping out and disposing of the rotted
rhizome tissue and liberally dusting what remains with Comet or a similar
household cleansing powder seems to work as well as anything. When rhizomes
are lifted and divided, soaking them for at least twenty minutes in a
solution that contains at least 10% bleach seems to break the chain of
transmission.
Jeff Walters in northern Utah (USDA Zone 4/5, Sunset Zone 2, AHS Zone 7)
jcwalters@bridgernet.com
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