In my hands I have a bottle of Organocide by Organic Laboratories Inc. It is 5% sesame oil, 92% fish oil, and 3% lecithin. It kills mites, scale, thrips, etc. It SAYS it controls black spot and other soilborne fungal pathogens. I did not use it this year for disease control. I used it for insect control on my autos, but will take the fungal protection. I used Serenade exclusively for blight/black spot on tomatoes which are by far the most susceptible plants. Considering the conditions( we have had 45 days of above average temps and sky high humidity), and the fact that last year I was crushed by blight, I truly believe Serenade has helped a lot. If you start early and get the herd established maybe you would not have to reapply as often as recommended.