Thanks.
Looking at those pictures, you may want to consider that straw mulch. It might be easier to walk in your gardent. It helps to retain water and reduces mud or dirt splashing up on the leaves in a rain storm, the source of some fungal diseases. When you mulch you may want to remove lowest leaves at the stem and the cups and start watering farther out from tomatoes. See if this helps the problem.
God Bless you and may it work!