Re: Re: iris pineappleing

> From: Laurie <laurief@paulbunyan.net>
> >The rhizome is not visibily affected.  The leaves are all wrinkled,
> >thick , and distorted so badly that the stalk,if any, can't produce a
> >decent bloom.  We think itis micro-climate induced.  We either ignore it
> >or behead it.  Usually theincrease are not affected.
> 
> According to "The World of Irises", pineappling is described as follows:
> "The rhizome enlarges to many times its normal size, foliage is variously

> dwarfed and often folded or pleated, and flowering stems are short, 
> clubby and malformed.  Underground, the roots may persist only near the 
> newer growth.  Sometimes an entire clump will be affectd but usually only

> a portion is involved.  The unaffected portion may grow and produce 
> normal foliage and flowers the following year."
> I suspect we are discussing two different things here.  Pineappling as 
> defined above would seem to be a disease process of some sort.  What is 
> being described by most folks on this thread, however, does not seem to 
> be affecting the rhizomes or roots in any way.  I would assume this sort 
> of leaf, stalk, and bloom malformation is due to climatic variables 
> *without involvement* of an actual disease process.

Laurie,

I agree with what you have written based on my experience. A TB rhizome
that I received from a warmer climate developed all the symptoms of
Pineappling as you have quoted from "The World of Irises". It bloomed the
spring after it was planted with a normal flower on a 3-inch "stalk". As it
never developed normal foliage or a healthy root system, I discarded it
after it bloomed. 
Occasionally I see fans with the contorted and tangled foliage that does
not unfold normally. It seems to be a growth problem associated with
alternating periods of hot and cold weather during early spring. Irises
that exhibit this characteristic eventually recover from it completely.

Jeff Walters in northern Utah  (USDA Zone 4/5, Sunset Zone 2, AHS Zone 7)
jcwalters@bridgernet.com




 

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