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nafex - Re: [NAFEX] Blight and Old Wives Tales

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  • From: "hector black" <hblack1925@fastmail.fm>
  • To: "North American Fruit Explorers" <nafex@lists.ibiblio.org>
  • Subject: Re: [NAFEX] Blight and Old Wives Tales
  • Date: Tue, 4 Oct 2005 07:44:05 -0500

This was my first year of trial, but I also grow Brandywine from saved seeds and regularly had blight problems. I read that some fungus don't like an acidic or alkaline environment, so I sprayed the foliage with bicarbonate of soda and spreader/sticker about every week, and tried to do it after a rain when the foliage had dried. I still got blight, but nowhere near as badly as before and really had a good crop. About to pick the last one. 1 tbsp bicab, 1 tbsp spreader to one gallon water. It would be interesting to know if this works for anyone else. Hector Black zone 6 middle TN
PS also tried it to control anthacnose on black raspberries and while control is not complete they look better than they have in years.

----- Original Message ----- From: "Jim Fruth" <jfruth@uslink.net>
To: <nafex@lists.ibiblio.org>
Sent: Tuesday, October 04, 2005 7:00 AM
Subject: [NAFEX] Blight and Old Wives Tales


Looks like I didn't provide enough information when I started this
subject. My volunteers are Brandywine and Roma, both of which produce
offspring identical to the parents. My blighted plants that I started from
(my own) seed are the same, Brandywine and Roma. I ALWAYS get blight and I
ALWAYS mulch heavily except when I tried plastic mulch with only a tiny hole
for the tomato plant to grow through. Consequently, the below hypothesis,
offered by one reader, needs to be altered into some other mechanism because
my plants NEVER get splashed from soil to the leaves.


Most blights are transferred by water from soil. Rainfall or water from the
hose causes soil laden with blight spores to splash up on the lower leaves
of a tomato plant transferring the spores to a friendly growing environment.
That's why a thick blanket of mulch under tomatoes works well. Your
volunteers may have natural immunity to certain blights. If they are
offspring of a hybrid, they may be versions of an open-pollinated variety
used to create the hybrid.
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