Down here in disease central I use several fungicides regularly. I usually start out with Daconil for the first few weeks and then start switching back and forth with a copper spray about every 7 to 10 days. Despite that diseases still show up eventually in our hot humid climate and then I will use the bleach spray as soon as a problem shows itself then resume my preventive sprays of the two fungicides. I also mulch heavily and keep my plants pruned to allow good airflow and sunlight. I envy people who live where spraying isn't necessary and disease pressure is light; but I wouldn't trade it for my very long tomato season which allows me to start eating fresh tomatoes in late May and right on through November or beyond.
Bill
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