Tomato Septoria Leaf Spot

Tomato septoria is a fungal disease caused by Septoria lycopersici. Numerous small, round spots with a dark border and a grayish center appear on the leaves; tiny black dots may be visible within the center. The disease usually begins on the oldest, lower leaves and spreads rapidly when plants are frequently watered and humidity is high. The risk can be reduced by watering at the base of the plant, ensuring good air circulation, removing infected leaves and plant debris, and practicing crop rotation.