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Re: Strange Markings on TB Stem
  • Subject: Re: Strange Markings on TB Stem
  • From: Bill Chaney <billchaney@ymail.com>
  • Date: Mon, 13 Jun 2011 21:53:54 -0700 (PDT)


I have never seen this type of damage in iris, but it reminds me of damage I have seen on celery when I was working in California.  The cause was feeding from true bugs (often the Lygus Bug).  They are pretty secretive so not seeing them doesn't mean they were not there.  It seems that the feeding of the bug damages cells that cause the marks as the stems elongate.  Just a guess....


From: Barb Jackson <jacksonb@mts.net>
To: iris-photos@yahoogroups.com
Sent: Mon, June 13, 2011 6:17:25 PM
Subject: [iris-photos] Strange Markings on TB Stem


My sister and I have discovered a couple of TB iris with a pattern of
marks on the stem just under the first branch on different stalks.

There have been no bugs noticed in either area and the stem was not
staked. The top of the attached photo (with apologies for the quality)
is where the branch starts.

Any ideas welcome as to what might have caused the marks.


BJ in SW MB, Canadian Prairies, Zone 3(ish)

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