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Re: Disease or insect?

  • Subject: Re: Disease or insect?
  • From: "terry94705" <strath@berkeley.edu>
  • Date: Thu, 23 Apr 2009 03:29:54 -0000

One thing to add: the stems are dried looking-- not mushy. And these are all very recent introductions. I usually bring alot of rhizomes to our iris society sale, but don't want to do that if this is a disease. I'll try to post a photo.

Thanks for applying your expertise

--- In iris-photos@yahoogroups.com, "terry94705" <strath@...> wrote:
> Last year I had one clump of TBs that developed a stem problem at bloom time. A middle section of the stem, 3-4 inches long, collapsed in on itself and could no longer support the weight of the blooms. When I examined it more closely the section looked dried out, and had a hollow core. I thought it might be insect damage, but could find no entrance or exit hole.
> This year that same plant is heavily damaged again. Plenty of normal sized blooms, but the withered sections of stems start bending over. I'm especially concerned because I see the same thing happening now to two more plants --one new, one well established-- about 10 feet away.
> The plants adjacent to the first plant look OK, which makes me think its bugs, but I just don't know.
> Obviously I should tear these plants out if it is disease. Does anyone know about this?
> Terry

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