David Hill wrote:


".........So it's back to things like Bordeaux Mixture (Lime and Sulphur)
Copper Etc
Will have to dig out my old books... .........."

"........They are one hell of a lot safer for humans. ........"

Are they????????
Very intensively used as an insecticide around 1900's,1910's, 1920's,
1930's, was Paris Green
This was an Arsenic based compound.
Then we had DDT........

Yes lets bring back the old remedies

Yes discovered *relatively* recently in the history of Horticulture in
most cases.
//
Jim