"sam" wrote in message
news
Can someone identify this tomato disease, please ?
It starts like this, then spreads to other leaves.
The fruit seems to be OK but without healthy leaves
immature fruit cannot mature.

Variety - Brandywine.

I also have Shirley in the greenhouse but they
have a good resistance to it and do not need to be pulled out.


http://www.23hq.com/Sam62/photo/901943

Scroll to 'Magnesium Deficiency' on this site as this may well be your
problem. http://www.hbci.com/~wenonah/min-def/tomatoes.htm

It can be treated:
http://www.rhs.org.uk/advice/profiles0701/magnesium.asp

Regards,
Emrys Davies.