Leaf spot

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Leaf spot
Causal agents: fungi or bacteria
Hosts: plants

Leaf spots are round blemishes found on the leaves of many species of plants, mostly caused by parasitic fungi or bacteria.

A typical spot is "zonal", meaning it has a definite edge and often has a darker border. When lots of spots are present, they can grow together and become a blight or a blotch. Fungal spots are usually round or free-form in shape.[1]

In most cases, leaf spots are considered to be only a cosmetic problem, but they can have economic effects on nurseries or in floriculture.

See also[edit]


  1. ^ "Leaf Spot Diseases of Shade Trees and Ornamentals". Missouri Botanical Garden. Retrieved November 11, 2014. 

External links[edit]