> Message: 2
> Date: Sun, 14 Oct 2007 13:03:46 +0100
> From: Oliver Sparrow <[EMAIL PROTECTED]>
> Subject: Re: [OGD] Orchids Digest, Vol 9, Issue 320
> Two points: Bordeaux mix is copper sulphate plus copper oxychloride. If ou
> apply it frequently to mounts they may accumulate toxic quantities of
> copper, which is of course an effective phytotoxin. (It used to be used to
> kill green gunk in swimming pools, for example.)
Where I grew up, Bordeaux Mixture was a mixture of Copper Sulphate
and Lime. I used to use it on potatoes to control late blight.
John Waddington
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