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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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