Tomato plant problems in green house
For the last 2 years I've had this disease kill my tomato plants in the green house. It starts out with brown patches on the stem at the bottom or on some leaves and spreads eventually killing the whole plant. This year again when the problem started, I researched on the this topic and thought it might be blight. So I sprayed the plants with Organocide which is a organic insecticide and fungicide. As soon as I sprayed this, the leaves and stems started wilting even more. Now bottom half of the plants are pretty much dead. Any help will be appreciated.
Here is a link that might be useful: Organocide