Re: iris pineappleing

>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."

It also states that pineappling can appear at any time during the growing 
season and is more prevalent in the warmer southern areas.  No pathogen 
or cure has been identified.

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.

Does that make any sense?

Laurie
zone 3b northern MN - which is decidedly NOT in the warm South but where, 
nonetheless, I usually have a number of malformed fans each year.

 

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