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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Common spot of strawberry ： ウィキペディア英語版 Common spot of strawberry Common spot of strawberry is one of the most common and widespread diseases of strawberry. Common spot of strawberry is caused by the fungus ''Mycosphaerella fragariae'' (imperfect stage is ''Ramularia tulasnei''). Symptoms of this disease first appear as circular, dark purple spots on the leaf surface. ''Mycosphaerella fragariae'' is very host specific and only infects strawberry. ''Mycosphaerella fragariae'' is a species from family Mycosphaerellaceae. == Hosts and symptoms == This disease affects strawberry plant foliage causing purple spots ⅛ to ¼ inches across on the upper side of the leaves. At first, the whole spot is purple but as the disease matures the center of the leaf spots become tan or gray, then almost white. When numerous spots merge foliage death can occur; this can stunt or kill infected plants when severe. On petioles, stolons, calyxes, and fruit trusses, elongated lesions may form and interfere with water transport in the plant, weakening the plant and making it more susceptible to invasion by a secondary organism.〔 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「Common spot of strawberry」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.