Texas A&M University has some great resources for tomato growers. I've found the "Tomato Problem Solvers" tool to be a great resource:
http://aggie-horticulture.tamu.edu/publications/tomatoproblemsolver/
To me, it looks like it could be one of the various fungi that affect tomato leaves...
Thanks - we've got some neem oil at the house that I will try.
Also, I may be wrong, but I'm pretty sure that copper hydroxide fungicides such as NuPro are actually certified organic (I think Texas A&M actually recommends it as an effective organic fungicide/bacteriacide). I'm no organic...
Thanks for all of the responses. Just to address some of the questions and provide some additional detail:
We have planted between 5-10 of each of the following variaties this year:
-Celebrity
-Homestead
-Early Girl
-Better Boy
-Big Boy
-Big Beef
-Beefmaster
-Mortgage Lifter
-Brandywine...
Hi all - I've been lurking around the forum for a while but finally took the plunge and registered.
Just for a little background, I am pretty fortunate to have grown up around agriculture all of my life. I grew up on a working rice farm and cattle ranch outside of Katy, Texas (which is about...