Re: iris borer, Iris tectorum

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Threre are many climates where iris do well, but the borer taps out sooner. Seems to be even more dependent on cold weather. But don't forget, it was born in Canada.

Chuck

-----Original Message-----
From: Rodney Barton rbartontx@yahoo.com [iris-species] <iris-species@yahoogroups.com>
To: Mark Cook hemerocallis1962@gmail.com [iris-species] <iris-species@yahoogroups.com>
Sent: Wed, Mar 11, 2020 10:15 pm
Subject: Re: [iris-species] iris borer, Iris tectorum

We don't iris borer here in North Texas but TBs do just fine.
R

On Wednesday, March 11, 2020, 7:11:29 PM CDT, Mark Cook hemerocallis1962@gmail.com [iris-species] <iris-species@yahoogroups.com> wrote:

  That would explain the absence of borers.  Florida for instance has some
cold snaps, but they are not prolonged.  The spring is extremely dry.

I wonder if the southern limit of the Iris Borer would be very similar
to the southern limit of Tall Bearded Irises?

Mark A. Cook

On 3/11/2020 8:19 AM, Chuck Chapman irischapman@aim.com [iris-species]
wrote:
> It has to do with winter weather. AS part of their life cycle they need specific weather. A cold period follower by humid spring. They hatch under a change from cold weather to time with initiation of growth of new foliage in iris in spring.
>
> Without these specific climate conditions they don't survive. They evolved with iris. Much the same way there is a southern limit for survival of iris.
>
> Chuck
>