Leaf spot

Leaf spot
Leaf spot caused by Cercospora capsici
Causal agentsFungi or bacteria
HostsPlants

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 (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.[2]

  1. ^ Horst, R. (2008). Westcott’s Plant Disease Handbook  (Seventh Edition.). Springer Netherlands.
  2. ^ Lucas, G., & Campbell, L. (1992). Introduction to Plant Diseases Identification and Management  (2nd ed. 1992.). Springer US. https://doi.org/10.1007/978-1-4615-7294-7