Re: 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
>

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