Re: Planting times?

Martin wrote:
On Wed, 18 Feb 2009 14:59:26 +0000 (GMT), nmm1@xxxxxxxxx wrote:

In article <es6op4printnnrf64n563vsu9m17cqa14t@xxxxxxx>,
Martin <me@xxxxxxxxxxxxxxx> wrote:

http://www.scienceblog.com/community/older/2001/E/200115402.html
"* Control of potato blight traditionally relies on copper-based
fungicides such as Bordeaux mixture (consisting of two chemicals,
copper sulphate and calcium oxide). However, copper is potentially
toxic and is banned from food produce labelled as organically grown."

However, it is also an important micronutrient, with an adult needing
of the order of 1-2 mg per day, and the lowest recorded lethal being
of the order of a gramme. There is effectively NO chance that spraying
the foliage with Bordeaux mixture will cause the tubers to contain
enough to be harmful.

Being careful with tomatoes is worthwhile, of course.

Being careful with the build up of copper in the ground and ground water
is also important.

The EU has been discussing a complete ban on the use of copper sulphate in
agriculture for almost ten years.

They want to see if they can repeat the Irish potato famine all over Europe.

I am afraid that the green inmates are taking over the asylum, banning
everything in sight without thinking about the consequences.

--
Jeff


.

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