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Re: Amophophallus titanum tuber problem

Dear E Morano,

dear Zeren,

thanks for your response.....


The tubers were in SLIGHTLY moist pooting mixture during dormancy and there where tubers that were OK in the same container; so I do not think it was dessication.

@all aroiders:

Meanwhile some more information, since I sent some tubers to our German Plant Protection Service (PPS) for inspection and got a pm from our Lord P.(lant-pathogen-diagnostic-service) as well.

The latter (Thanks a lot, Wilbert!) suspected Fusarium indicated by the suberized outer layer of the tuber.

This was confirmed, since the Plant Protection Service found Fusarium and many saprophytic fungi (mainly Trichothecium).

They did not find plant pathogenic bacteria which I suspected first. (And I am very lucky that they didn't......)

Lord P. assumes that bad growing conditions and/or a too long dormancy are the most likely reasons for the symptoms found.

He recomended to peel the dead material off the tuber and pot it in new substrate.

The PPS recommended to pay more attention to hygiene (pots, substrate, water etc) and to treat the tubers with MennoFlorades (active ingredient: benzoic acid) and Boscalid (a broad-spectrum fungicide).

I will see what comes out of it....

Happy(er) growing,


-----Original Message-----
Date: Mon, 07 Apr 2008 09:58:19 +0200
Subject: Re: [Aroid-l] Amophophallus titanum tuber problem
From: E Morano <ironious2@yahoo.com>
To: Discussion of aroids <aroid-l@gizmoworks.com>

That looks like rot. Sometimes the tuber rot can smell bad.

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