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Re: Rot advancement through a rhizome

  • Subject: [iris-photos] Re: Rot advancement through a rhizome
  • From: "lmmunro" lmmunro@hotmail.com
  • Date: Wed, 09 Oct 2002 03:48:30 -0000

Yeah, its yucky...but your photography is great.

--- In iris-photos@y..., oneofcultivars@a... wrote:
> This picture shows the rot advancement through a rhizome from the 
most mature 
> end to the leaf end. The bottom section of rhizome is inverted and 
a mirror 
> image of the top section. Advancement path is more pronounced on 
the bottom 
> portion of the rhizome and continues through the rhizome to what 
was once the 
> leaf end. Erwinia again appears to erupt to the surface (1). The 
> on the top side appears to advance only to (3). Discolored area 
near the leaf 
> end appears to be the Erwinia attacking the rhizome tissue from the 
leaf end 
> (2) perhaps after it has consumed its available food in that area. 
> greater penetration of rot on the mature end is obvious.
> Healthy sectioned rhizomes have a noticeably yellow tint compared 
to the gray 
> exhibited by this infected rhizome. It is possible that gray tissue 
is dead 
> tissue and not necessarily infected. I have no way to confirm.
> This rhizome is my candidate for "Ugly Iris of the Year" title. It 
is not 
> expected to recover from the operation. <g>
> Smiles while holding my nose,
> Bill Burleson 7a/b
> Old South Iris Society

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