Bacterial spot
Tomato

A leaf spot is a limited, discoloured, diseased area of a leaf that is caused by fungal, bacterial or viral plant diseases, or by injuries from nematodes, insects, environmental factors, toxicity or herbicides. These discoloured spots or lesions often have a centre of necrosis or cell death.[1] Symptoms can overlap across causal agents, however differing signs and symptoms of certain pathogens can lead to the diagnosis of the type of leaf spot disease. 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.<br>Bacterial spot gives harm to the leaves, twigs and fruit. By the time the disease is recognized, it is often too late to stop it.[4] However, some kind of sprays may be used early in the next season to protect the peach tree.