[compost_tea] Re: blackspot

From: <soilfoodweb_at_aol.com>
Date: Sat, 07 Jun 2003 12:05:56 -0400

It is easy to protect your leaves from the fungus that causes black-spot. Paulette is correct in pointing out that it is the spores of the fungus that are black. The initial infection is just vaguely gray, as the fungal hyphae start growing on the leaf surface. As the hyphae mature, spores are formed. The spores are black. The spot gets larger as the fungus grows outward.

The main agent of protection seems to be coverage. If some organism is already present on the leaf surface, the black spot fungus cannot push someone else out of the spot. The enzymatic ability of the black-spot fungi is so weak that it cannot outcompete any other critter. So why is black-spot so prevalent? We do things all the time to destroy the biology on the surfaces of leaves......

Get the organisms back on your leaf surfaces, and then stop killing them. Get your neighbors to stop doing things that kill the healthy set of organisms on the leaf surfaces.

Elaine Ingham
President, Soil Foodweb Inc.
SFI Corvallis, OR
SFI Port Jefferson, NY
SFI Lismore, NSW, Australia
SFI Hilversum, The Netherlands
SFI Cambridge, New Zealand
www.soilfoodweb.com

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Received on Sat Jun 07 2003 - 13:18:49 EDT

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