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Title: Two new species of Stemphylium from Northwest China

Author
item WANG, YOUNG - Shandong Agricultural University
item FU, HONG-BO - Ministry Of Science And Technology Of The People'S Republic Of China
item Oneill, Nichole
item ZHANG, XIU-GUO - Shandong Agricultural University

Submitted to: Mycological Progress
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 4/30/2009
Publication Date: 5/15/2009
Citation: Wang, Y., Fu, H., Oneill, N.R., Zhang, X. 2009. Two new species of Stemphylium from Northwest China. Mycological Progress. 8(4):301-304.

Interpretive Summary: Fungus diseases caused by species of Stemphylium severely reduce yields and quality in important forage and food crops, including forage legumes, fruit tree, and vegetable crops. The fungi cause leaf, stem, and pod necrosis in humid climates throughout the world. It is important to know specifically which fungi are causing certain diseases so that control measures can be developed and quarantine procedures implemented when needed. Many of these fungi are difficult to distinguish from one another based on their morphology alone, as seen microscopically. We compared several species and strains causing diseases in alfalfa, pear, and apple, using molecular DNA sequencing and morphology. The research resulted in the identification and characterization of a two new pathogen species. The research will enable scientists, breeders, and industry to identify the specific causes of Stemphylium diseases and lead to implementation of appropriate disease control strategies.

Technical Abstract: During surveys of hyphomycetes from the Northwest of China, two undescribed taxa of Stemphylium were discovered from diseased leaves of Malus sieversii and Pyrus sinkiangensis in Sinkiang Provence, which are described as S. mali and S. pyrinum. The two species differ from similar species morphologically.