My 2 tomato plants (SuperFantastic and about 7 feet tall now) are being ravaged by what I assume is Early Blight. Foliage is turning yellow and then completely dying off and this has made its way up to now to almost half the total height of the plant. I have been foliar spraying with plant wash and Garret Juice one week and then cornmeal tea the next for about 6 weeks now since I first noticed the blight starting. What else can I do if anything? Thanks.