Prolonged wet and humid conditions promote leaf spot disease and most pathogens are spread by wind, splashing rain or irrigation that carry the disease to other leaves.

How is bacterial leaf spot spread?

Spread: Bacteria on the plant surface are easily spread by splashing water from rain and irrigation to nearby plants. Asymptomatic plants can serve as a source of inoculum.

Does leaf spot spread to other plants?

Symptoms of Leaf Spot Damage

Leaves infected with leaf spot will yellow and may drop prematurely. The fungal blight can sustain itself and reproduce in the dead debris of the plant. This will cause the disease to further spread and possibly infect other plants.