iris fly?
Adam Fikso (Wed, 10 Jun 2009 10:27:38 PDT)
This does not look like typical iris borer damage which is usually confined
to the edges of leaves early in the year--and the grubs are much
bigger--about 4-5 cm-- which go down into the rhizome and hollow it out, at
which point the leaves turn watery looking and rot from the inside of the
stem outwards. Also, Iris borer in the U.S is much earlier, about April-May
in the Chicago area. If I had to suspect a pest from the U.S. I'd think one
of the leaf hoppers which tend to do more surface damage to softer parts of
the leaves between the veins.
Not iris borer from your photos , but you've got me hooked enough to check
some other references
. ----- Original Message -----
From: "Carlo A. Balistrieri" <carlobal@netzero.com>
To: "Pacific Bulb Society" <pbs@lists.ibiblio.org>
Sent: Wednesday, June 10, 2009 11:43 AM
Subject: Re: [pbs] iris fly?
Janos,
Look up "iris borer". It's a fairly common pest encountered by people
who grow iris. I'm surprised Adam hasn't seen it. I lived in his part
of the country most of my life and encountered the grubs tunneling
through leaf and rhizome.
On Jun 10, 2009, at 12:27 PM, Adam Fikso wrote:
Hello Janos- I've grown irises for more than 35 years (but in the
U.S.) and
have never seen the insect you describe, nor the kind of damage you
show in
your photo. It may be something new to your area or peculiar to
that one
shipment. I think you are wise to burn the affected leaves.
Carlo A. Balistrieri, Executive Director
The Gardens at Turtle Point
Tuxedo Park, NY
845.351.2849
Zone 6
visit: http://www.botanicalgardening.com/ and its BGBlog
coming soon: Carlo Balistrieri Photography
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