I have been growing these Burpee Fourth of July hybrids in containers. I had good luck with them five years ago in another state, found some old seeds, and gave it another go down here. Anyway, one of the plants has developed some yellowing, and I am kind of at a loss. At first, I thought that maybe they were victim of roundup drift, which I had sprayed nearby a week ago, but it doesn't seem to be that. And I had thought these were toms were VFN resistant, but maybe not? The package doesn't say.

I have included some pictures here, and it looks like a nearby pumpkin plant is also suffering from the same affliction. I figured it might be easier to diagnose if all pix are shown.

The flickr set