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Message: 6
Date: Fri, 2 Dec 2005 01:11:26 EST
From: Jwlehman@aol.com
Subject: [NAFEX] Manganese poisoning test proposal.
To: nafex@lists.ibiblio.org
Message-ID: <128.6a6378ea.30c13f8e@aol.com>
Content-Type: text/plain; charset="us-ascii"
It has been suggested but never proven that one cause of kaki death is
Manganese poisoning due to low pH or acid soil. Lee is correct, sulfur would only worsen the problem. Unless that isn't one of the causes of KSD. Someone where kaki can be grown and is on acid soil needs to set up an experiment. I can't do it in Indiana.
What I'd suggest is as follows. Establish 10 D. virginiana 90 chromosome
seedlings in a block on low pH soil where KSD is a known problem. Then in another area next to it another 10 D. virginiana 90C seedlings and lime that area so the pH is 6.5 or higher at a depth of 12 inches. Once the seedlings are established, about 3 years, graft them all to a variety of kaki and I'd suggest Jiro. If the grafts in the acid soil shepherd hook and die while those on the limed block survive it would be good evidence of mineral poising. Would it not?
Discussion please.
I'll supply all the seeds anyone needs free.
Jerry
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