On Wed, 13 Aug 2003 19:18:08 +0000 (UTC), "Franz Heymann"
wrote:


"Pam Moore" wrote in message
.. .
I have just picked my first tomatoes for 5 years, having lost all to
blight for the last 4 years.
This year for the first time I have used Bordeaux Mixture which is
suggested as the nearest organic control.

There is no constituent in Bordeaux mixture which is organic. Its two
components, copper sulphate and calcium hydroxide, are both quite strictly
*inorganic*.

Now I am concerned about the white copper sulphate deposits on the
fruit.
Is copper sulphate toxic?

see http://www.cleartech.ca/inside/msds/cupm-05-05-2003.pdf
--
Martin