Purple Spots & Other Leaf Issues

[audrey17]

Hey All

I have a Giant Belgian Pink tomato plant (in a 15 gallon fabric pot w/irrigation tubing) that is having leaf issues.
It’s got tomatoes growing & new ones forming but the bottom leaves are
starting to show problems. Purple spots & that frightening “water mark-ish”
appearance. It looks like maybe there are 2 things going on but I have no idea
what they are.
We have had some seriously jacked-up weather here in SE Louisiana this spring-5 straight days of rain, then hot & dry—then more rain (& high winds).
I’m spraying weekly with Daconil & alternating with copper or mancozeb, but I’m thinking it’s just been to much rain to avoid cooties!

The other 3 plants (Cherokee P., GGWT & L. Sunset) are fine—same grow bags, same potting mixture & same fertilizer.