Prostetnic Vogon Jeltz said:

A blight is spreading through my tomato plants,

http://www.polybus.com/blight.jpg

Can someone identify this. Is there anything I can do?

It looks to me (based on the single photo) like one of the leaf spots,
like bacterial spot or septoria spot. Remove the badly infested leaves
and use a copper spray on the plants. I'd also suggest using a kelp
(such as Maxicrop) in your foliar spray. The extra potassium and
micronutrients would be valuable. (I'm looking at the illustrations
in _Identifying Diseases of Vegetables_ published by Penn State.)

Try looking at the photos here and see what you think:
http://aggie-horticulture.tamu.edu/t...ver/index.html

(And please, no poetry!)

--
Pat in Plymouth MI ('someplace.net' is comcast)

Any technology distinguishable from magic is insufficiently advanced.
(attributed to Don Marti)