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''Ascochyta pisi'' is a fungal plant pathogen that causes ascochyta blight on pea, causing lesions of stems, leaves, and pods. These same symptoms can also be caused by ''Ascochyta pinodes'', and the two fungi are not easily distinguishable.〔(Pea Ascochyta Blight Symptoms )〕 == Hosts and Symptoms == The host of ''Ascochyta pisi'' is the field pea (''Pisum sativum L.''). Field pea is an annual, cool season legume that is native to northwest and southwest Asia. Ascochyta blight of peas is one of the most important diseases of pea in terms of acreage affected. Yield losses of 5 to 15% are common during wet conditions. Symptoms include: * spots on stems, leaves, tendrils, and pods (can be purplish, black, or brown in color) * lesions on stems, leaves, tendrils, and pods (can be purplish, black, or brown in color) * pod lesions become sunken * black spore-producing structures form in the lesions〔 * with high humidity spots can enlarge and coalesce, resulting in the lower leaves being completely blighted * stem girdling * pod lesions can happen in moist conditions or if pea has lodged * infected seeds can appear discolored and purplish-brown * lightly infected seeds often appear healthy 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「Ascochyta pisi」の詳細全文を読む スポンサード リンク
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