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Podosphaera fuliginea
''Podosphaera fuliginea'' (also known as ''Podosphaera xanthii'') is a plant pathogen that causes powdery mildew on cucurbits. ''Podosphaera fuliginea'' and ''Erysiphe cichoracearum'' are the two most commonly recorded fungi causing cucurbit powdery mildew. In the past, ''Erysiphe cichoracearum'' was considered to be the primary causal organism throughout most of the world. Today, ''Podosphaera fuliginea'' is more commonly reported.〔〔Tetteh, A, et al. Watermelon Crop Information. http://cuke.hort.ncsu.edu/cucurbit/wmelon/wmhndbk/wmpm.html〕
== Signs and symptoms ==
Powdery mildew is manifest on the plant by white powdery fungal growth on the surface of the leaf, usually both sides of the leaf show fungal growth.〔McGrath, M.T., 1997. Powdery Mildew of Cucurbits. http://vegetablemdonline.ppath.cornell.edu/factsheets/Cucurbits_PM.htm〕 The host tissue is frequently stunted, distorted, discolored, and scarred.〔Glawe, D.A., Grove, G.G., 2010. Powdery Mildew Diseases. http://plant-disease.ippc.orst.edu/articles.cfm?article_id=30〕 The fruit of infected plants are usually smaller and the flavor is affected negatively, as fewer sugars and solids are stored in the fruit.〔〔Trigiano, R.N., Windham, M.T., Windham, A.S., 2008. Plant Pathology: Concepts and Laboratory Exercises 2nd Edition. CRC Press.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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