Septoria leaf spot

Caused by: Septoria lycopersici
Problem Category: Fungal Disease
Symptoms: Symptoms may occur at any stage of tomato development and begin as small, water-soaked spots or circular grayish-white spots on the underside of older leaves; spots have a grayish center and a dark margin and they may colasece; fungal fruiting bodies are visible as tiny black specks in the center of spot; spots may also appear on stems, fruit calyxes, and flowers.
Comments: Spread by water splash; fungus overwinters in plant debris.
Management: Ensure all tomato crop debris is removed and destroyed in Fall or plowed deep into soil; plant only disease-free material; avoid overhead irrigation; stake plants to increase air circulation through the foliage; apply appropriate fungicide if necessary.
Control: Mix 5% Neem seed kernal extract in 100 litre of water