Re: Re: CULT: crown rot vs southern blight?
- To: i*@egroups.com
- Subject: Re: [iris-talk] Re: CULT: crown rot vs southern blight?
- From: w*@watervalley.net
- Date: Sat, 6 May 2000 10:10:52 -0500
- Priority: normal
> What's the difference between these two - southern blight if it occurs
> in zone 8+, crown rot farther north?
>
Linda, these conditions are two different iris ailments. Scorch
is not slimy, but a plant in a weakened condition touched by
scorch may eventually rot. There is probably where the confusion
occurs. With SB/rot, I have had fans green to the tip rot off at the
point where the fan meets the rhizome. That is rot. With scorch,
the leaves look as if somebody ran a hot iron up and both sides of
the leaves or poured scalding water on them. They remain upright
for awhile, and then collapse as dead, brown leaves. The rhizomes
are still firm, but the roots are spongy and squishy.
> I'm wondering what to call the slimy ick - starts with stalks and
> outer leaves, turning a bilious bright, wet looking green, then rots
> off the stalk bases. Always hits vulnerable cultivars in warmer
> weather either after stress of freezes or stress of drought followed
> by stress of a lot of rain (which we seem to have constantly this
> spring). It doesn't look or smell like soft rot.
>
Your allergies must prevent you from smelling this ick! Yes,
warmer weather brings it on. Scorch is early while we are still on
the rollercoaster rides of warm and cold.
Walter Moores
Enid Lake, MS 7/8 USA (PINK DIMITY's bloom is as big as an
'oversized' saucer).
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