posted on Jun, 19 2010 @ 11:01 PM
That looks like a fungal problem. Septoria leaf spot, anthracnose, and
maybe verticillium wilt on the tomatoes. Stem damage is generally how
late blight first attacks as well. The initial stage looks similar to powdery
mildew. Hard to tell from the pix, but powdery mildew has a powdery ever
so slight fuzziness to it. But, it could be Chemical damage as well. The thing to
do is to collect some of the water for testing, and collect some of the leaves for
testing. Put the leaves in a location where they can dry out. Once dry, put them
in an airtight container. Spectral analysis will reveal any chemical present.
You may want to bring some samples to a local tree/plant nursery, and discuss it with your neighbors. Chemical damage has many forms of indication.
From spots like you have, to yellowing streaks, to leaves turning brown black,
to complete defoliation. I know this isn't a slam dunk answer, but just to let
you know, it could be many different things and the only way to be sure would
through water testing. GET A SAMPLE IN A CLEAN SEAL CONTAINER!
I just hope to god it isn't what you think it is. Great Post