Leaf spot

Leaf spot

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.

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

ee also

'Leaf spot' in chestnut diseases.

External links

* [http://www.naturalwaylawn.com/disease/leaf_spot.html Leaf Spot and Lawn Care]

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Look at other dictionaries:

  • leaf spot — leaf′ spot n. ppa any of various plant diseases characterized by the formation of spots on the leaves • Etymology: 1900–05 …   From formal English to slang

  • leaf spot — n. any of various plant diseases characterized by lesions in the form of spots on the leaves …   English World dictionary

  • leaf spot — noun 1. : a discolored area on a leaf caused by parasitic organisms or environmental factors; especially : one having a more or less sharp line of demarcation between it and healthy tissue compare blotch, mosaic 2. : a disease characterized by… …   Useful english dictionary

  • leaf spot —   See fungal leaf spot …   Expanded glossary of Cycad terms

  • leaf spot — Plant Pathol. 1. a limited, often circular, discolored, diseased area on a leaf, usually including a central region of necrosis. 2. any disease so characterized. [1900 05] * * * …   Universalium

  • leaf spot — noun Date: circa 1895 any of various plant diseases characterized by discolored often circular spots on the leaves …   New Collegiate Dictionary

  • leaf spot — noun Any of various fungal or bacterial diseases of plants that cause blemishes on their leaves …   Wiktionary

  • leaf spot — noun a fungal, bacterial, or viral plant disease which causes leaves to develop discoloured spots …   English new terms dictionary

  • Corn grey leaf spot — Cercospora zeae maydis Scientific classification Kingdom: Fungi Division: Ascomycota Family: Mycosphaerella …   Wikipedia

  • Grey leaf spot — Taxobox | name = Cercospora zeae maydis regnum = Fungi divisio = Ascomycota familia = Mycosphaerellaceae genus = Cercospora species = C. zeae maydis binomial = Cercospora zeae maydis binomial authority = Tehon E.Y. Daniels 1925Grey leaf spot is a …   Wikipedia