Hi: On the few remaining tomatoes that I have left after spraying from the blight there are a SMALL number of fruits still with a bluish tinged residue from the Bordeaux mixture. I assume that these are too poisonous to eat but will they be OK to compost or will I kill some of the necessary inhabitants of my heap?

Hello Blighted
I would give the fruits a good rinse in clean water and they'll be fine to eat. The copper salts responsible for the bluish tinge are very soluble and should wash straight off.
If you don't want to do this then they can be put straight on the compost heap, again wash them if you're really worried but it's not necessary.

John

PS We might get bumped to another part of the forum when a mod sees this as we're in 'tools and machinery' at the moment.

How right you are John, you're now in Best Practice.

Phew, a safe landing - at least we didn't land up in 'General Chatter'.

John