Re: iris borer, Iris tectorum

 

They heavily infested my large spurias a few years ago, and (unsurprisingly) I've also had them in Iris dichotoma. I think Iris pseudacorus manages to be invasive by escaping infestation in deeper water. Since the borer is native, I don't take any measures other than good dead leaf cleanup in late winter/early spring, and vigilance during the growing season. I just tried a prescribed burn over one section of irises for the first time yesterday, and that seems like another promising way to control the overwintering eggs.

Sean Z
SE Michigan Zone 6a

On Mon, Mar 9, 2020 at 11:46 AM Ken Walkup k*@cornell.edu [iris-species] <i*@yahoogroups.com> wrote:
 

I have had them infest Siberians, too, with not such large rhizomes.  The worst thing I ever grew for borers was I. domestica (Belamcanda).
Ken


From: i*@yahoogroups.com <i*@yahoogroups.com> on behalf of Mark Cook h*@gmail.com [iris-species] <i*@yahoogroups.com>
Sent: Sunday, March 8, 2020 7:09:37 PM
To: i*@yahoogroups.com <i*@yahoogroups.com>
Subject: Re: [iris-species] iris borer, Iris tectorum
 
 

When I lived in Kentucky, I had Iris Borers to infest some clumps of Blackberry Lily, now known as Iris domestica.  Also, in one especially bad season, one got into a Daylily.  However, I believe it is extremely rare fore them to attack Daylilies.

Mark A. Cook 

On 3/8/2020 2:40 PM, Shaub Dunkley s*@bellsouth.net [iris-species] wrote:
The borer can infest any iris with rhizomes big enough to support it's life cycle. I had them appear in a couple of a couple Louisiana hybrids I was not monitoring. I read somewhere borers can infest daylilies but can't recollect the source.
Shaub Dunkley

On 3/8/2020 1:50 AM, Paul Archer p*@mindspring..com [iris-species] wrote:
 

It is.  I had many clumps at the side of the house.  All gone now but a coupe pieces after they were done.  The clump had been there for two years before they attached and it looked worse than any TB infestation I have ever had.



-----Original Message-----
From: "dkramb d*@badbear.com [iris-species]"
Sent: Mar 7, 2020 7:33 PM
To: i*@yahoogroups.com
Subject: [iris-species] iris borer, Iris tectorum

 

Does anyone know if Iris tectorum is susceptible to iris borer? And if
so, like to what degree compared to beardeds?

Thanks,

Dennis in Cincinnati





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