tomato blight!

[queen of the cobs]

I planted out lots of my tomato plants yesterday whilst chatting to one of the lovely chaps who helps run our allotments. After I'd got them all in, he dropped into the conversation 'oh, I tend to keep mine in the greenhouse as we've had quite a lot of trouble with tomato blight on the plot in the last few years'

Is there anything I can apply that will help fight the blight?

[Paulottie]

Bordeaux mixture in July. Dust them when leaves are damp.