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

Does anyone know how thoroughly I need to wash them?
Has anyone else used BM? Advice is to spray weekly.

Pam in Bristol