A couple of my tomato plants in raised beds--both hybrids, a Momotaro and a Hawaiian Tropic--about 2' tall now, are starting to show some kind of leaf problem. Bacterial canker, perhaps? There are little white blemishes on the leaf, and the leaf edges are curling and drying up. Not all of the leaves are affected, but it does seem to be spreading within the two plants. A third heirloom (Super Sioux) between them in the bed is completely fine. I didn't notice any of this when I removed the Walls O Waters a week ago.

Is anyone familiar with this? What if anything can I do?

Russ in Marana, AZ