My tomato plants have yellow/dry leaves and seem to have some bug damage. The weather isn't hot. They get plenty of water every other night. Lettuce has tiny black bugs. My potato leaves, lettuces, and tomato plants have some bug bites out of them. I'm new at this gardening thing, so could use all the advice I can get.
My Tomato Plants Have Yellow Leaves
Certified GKH Gardening Expert
This article will help you:
I hate to say it though, but it sounds like it may be alternaria. Here is more info on that: