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・ Leaf River (Minnesota)
・ Leaf River (Mississippi)
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・ Leaf River Township, Ogle County, Illinois
・ Leaf River Township, Wadena County, Minnesota
・ Leaf River Wildlife Management Area
・ Leaf River, Illinois
・ Leaf River, Minnesota
・ Leaf rust (barley)
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Leaf spot
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Leaf spot : ウィキペディア英語版
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.〔(【引用サイトリンク】title=Leaf Spot Diseases of Shade Trees and Ornamentals )
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 ==

*"Leaf spot" in chestnut diseases.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Leaf spot」の詳細全文を読む



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