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[Survey and pathogen identification of rhubarb diseases in Gansu province]. 2009

Yan Wang, and Xiurong Chen, and Yingdong Li
Gansu College of Traditional Chinese Medicine, Lanzhou 730000, China. gswangyan101@163.com

OBJECTIVE To investigate diseases occurring in Rheum palmatum in Gansu province and identify pathogen. METHODS Field survey in the main R. palmatum producing area and the pathogens were identified on the base of morphology. RESULTS Eight fungal diseases have been found after disease surveys on R. palmatum in Gansu province from 2004 to 2007. They were leaf smut (Thecaphora schwarzmaniana), leaf spot (Septoria sp.), rust (Puccinia rheipalmati), ring spot (Ascochyta rhei), powdery mildew (Erysiphe polygoni.), grey mold (Botrytis sp.), root rot(Fusarium oxyxporium) and a virus disease. CONCLUSIONS Leaf smut, a severe disease with the incidence of 14%-26%, is the urgent problem waiting to be solved effectively. Powdery mildew and grey mold were reported for the first time in China.

UI MeSH Term Description Entries
D010935 Plant Diseases Diseases of plants. Disease, Plant,Diseases, Plant,Plant Disease
D002681 China A country spanning from central Asia to the Pacific Ocean. Inner Mongolia,Manchuria,People's Republic of China,Sinkiang,Mainland China
D005658 Fungi A kingdom of eukaryotic, heterotrophic organisms that live parasitically as saprobes, including MUSHROOMS; YEASTS; smuts, molds, etc. They reproduce either sexually or asexually, and have life cycles that range from simple to complex. Filamentous fungi, commonly known as molds, refer to those that grow as multicellular colonies. Fungi, Filamentous,Molds,Filamentous Fungi,Filamentous Fungus,Fungus,Fungus, Filamentous,Mold
D005670 Fusarium A mitosporic Hypocreales fungal genus, various species of which are important parasitic pathogens of plants and a variety of vertebrates. Teleomorphs include GIBBERELLA. Fusariums
D001203 Ascomycota A phylum of fungi which have cross-walls or septa in the mycelium. The perfect state is characterized by the formation of a saclike cell (ascus) containing ascospores. Most pathogenic fungi with a known perfect state belong to this phylum. Ascomycetes,Cochliobolus,Sclerotinia,Ascomycete,Ascomycotas,Sclerotinias
D001487 Basidiomycota A phylum of fungi that produce their sexual spores (basidiospores) on the outside of the basidium. It includes forms commonly known as mushrooms, boletes, puffballs, earthstars, stinkhorns, bird's-nest fungi, jelly fungi, bracket or shelf fungi, and rust and smut fungi. Basidiomycetes,Basidiomycete,Basidiomycotas
D012250 Rheum A plant genus of the family POLYGONACEAE. Members contain chrysophanic acid, rhein, EMODIN, and other ANTHRAQUINONES. The roots were formerly used as PURGATIVES. Rhubarb,Chinese Rhubarb,Da Huang,Rheum officinale,Rheum rhaponticum,Rheum tanguticum,Huang, Da,Rhubarb, Chinese
D020171 Botrytis A mitosporic Leotiales fungal genus of plant pathogens. It has teleomorphs in the genus Botryotina. Botryti

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