| Don't know why no one responded earlier. And even though it's likely too late for the problem you had, I'll make a few comments. Because you saw problems so soonafter spraying, I suspect something went wrong with the application timing or weather. For one, I see you're in CA. So, what were the temperatures at that time? Anything 85F or above on the day of spraying will damage plants. And what does "heavily sprayed" mean? Any spray should only lightly cover all foliage. And because I'm not familiar with the product, is the stuff safe for tomatoes? Beyond all that, you need to know that few fungicides get rid of any existing disease. Instead, they are applied to protect the new growth. | 
