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Uromyces viciae-fabae var. viciae-fabae is a plant pathogen commonly known as Faba-bean rust. It is a leaf and stem rust of beans and causes partial defoliation, a reduction in photosynthetic leaf surface and a reduction in yield.〔(PaDIL )〕 This rust fungus occurs on both cultivated and wild plants of ''Vicia'', ''Lathyrus'', ''Pisum'' and ''Lens''.〔(A new leaf blight disease of Trifolium dasyurum caused by Botrytis fabae )〕 It is autoecious, completing its life cycle on one plant host and macrocyclic, producing five types of spores during its life cycle.〔Wilson and Henderson, 1966〕 ==Description== The spermogonia are mostly on abaxial leaf surfaces. The aecia are mostly on abaxial surfaces in small groups, mostly near the veins, the peridium is cupulate and whitish with spores 18–26 by 15–21 µm, broadly ellipsoid and verrucose. The uredinia are amphigenous and yellowish-brown with spores 24–29 by 19–22 µm, broadly ellipsoid, pale golden and uniformly echinulate, normally with four pores, either equatorial or variously distributed and with small caps. The telia are sometimes on the adaxial surfaces or sometimes amphigenous and on stems, exposed, blackish brown and compact with spores 27–35 by 19–23 µm, oval or obovoid, smooth and chestnut brown, the pedicels brownish and about 60 µm long.〔Cummins GB (1978) Rust Fungi on Legumes and Composites in North America. University of Arizona Press, Tucson, Arizona.〕 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「Uromyces viciae-fabae var. viciae-fabae」の詳細全文を読む スポンサード リンク
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