| 词条 | Leaf spot |
| 释义 |
| name = Leaf spot | image = 'Cercospora capsici.jpg | caption = Leaf spot caused by Cercospora capsici | common_names = | hosts = plants | causal_agents = fungi or bacteria | vectors = | EPPO_codes = | distribution = | treatment = }} 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. References1. ^{{cite web|url=http://www.missouribotanicalgarden.org/gardens-gardening/your-garden/help-for-the-home-gardener/advice-tips-resources/pests-and-problems/diseases/fungal-spots/leaf-spot-shade.aspx|title=Leaf Spot Diseases of Shade Trees and Ornamentals|publisher=Missouri Botanical Garden|accessdate=November 11, 2014}} External links
3 : Fungal plant pathogens and diseases|Bacterial plant pathogens and diseases|Leaf diseases |
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