This year, my tomatoes are trying hard to succumb to fungus. I've been pulling off black spotted leaves for a couple weeks now, trying to stay head. Today I sprayed with copper foliage spray and also thinned out the plants to try to get the most air circulation around them. I've been trimming up the bottoms so that when I do any hose watering, wet leaves are minimal.
I've also got what looks like rust on my beans. I had this last year, but since I had the copper spray out, I gave them a blast too. I don't think I'll be able to eliminate any of this completely. My hope is to simply stay ahead of it so I don't lose any crops entirely.