how do you use bordeaux mixture?

[antipodes]

I have some sachets of ready to mix bordeaux mixture, but I am unsure of how to use it. I spray it on potatoes and tomatoes, is that it? Do I spray leaves, the stems or what? Any special time or weather to do it?
My tomatoes are growing so well, I am really paranoid about them now.
Thanks for any help.

[antipodes]

[ceres]

We get blight every year on our site, so I start spraying soon after planting out tomatoes, chillis and sweet peppers.  We haven't had blight on potatoes so I've never sprayed them before but because of our weedkiller problem, I'm spraying them too this year.  Choose a day that's still, not sunny and ideally with no rain forecast for a couple of days afterwards.  Spray the whole plant, tops and undersides of leaves but set the sprayer to a fine mist so that it leaves a film on the leaves but doesn't start dripping off.  Repeat every 2-3 weeks.   

[Lindsay]

I gave my tomatoes and potatoes a spray all over of "bouillie bordelaise" a couple of weeks ago as we had had so much rain, and it made a big difference, the plants looked so much better for it!

Now I need to get the nettle tea on to the tomatoes - but I have the same question as yours antipodes - on to the leaves, or just a feed to the roots?   ???

[Trevor_D]

In the past, I've done a first spray mid-July and another at the beginning of August, whether there was any threat of blight or not. But last year we had severe problems with both hormone weedkiller damage & early blight, so I sprayed in June.

This year, some plots have had weedkiller damage and I've had a blight warning from Blightwatch, so I gave my tomatoes a dilute spray last week.

I've never had any problems with potato blight, so I don't normally spray these. (Had to last year, because of the weedkiller problem!)

[theothermarg]

we have blight on our site just a few plots away from ours!! weather looks a bit uncertain will try to get some tomorrow now I know what to do with it
marg