Re: CULT:Southern Blight and Leaf Spot

From: "Jan Clark" <janclarx@hotmail.com>

<< I turned on the Telly, to watch my favourite gardening show 
 "Gardening Australia". The segment showing was about leaf spot, and I 
 was greeted with a close up of a petri dish, filled with white fluff 
and dark brown spores - the mustard seed fungus.  >>

>Not to contradict here, but I have never seen Southern Blight causing
>'spotting' as we generally think of it on irises. Columbines yes, 
irises no.

The show was about leaf spot, not specifically iris. I only saw part of 
it, and didn't catch the name of the mustard seed fungus, nor the name 
of the plant it was supposed to affect.
I have certainly had one rz showing the symptoms described for Crown 
Rot. I would like to know which organism is responsible for leaf spot in 
Australia. I have had quite a few plants with unsightly blotches on 
leaves (TB's and I. tectorum) after rain. Hollyhocks have also had leaf 
spot, but this may not be from the same organism, as they are planted 
with unaffected iris.
Jan Clark

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