FIRST REPORT OF DETECTION OF Spongospora subterranea f.sp. subterranea (SSS) ON POTATO MINITUBERS IN GREENHOUSE IN IRAN and ITS ERADICATION

Document Type : Short Report

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Abstract

In winter of 2010 in a survey of foreign quarantine plant pathogens in Iran, some symptoms were observed on potato plants in a minituber production greenhouse in Ardabil province. Affected plant exhibited sphaerical to elongated or irregular lesions, with light to dark brown and black color on minitubers, and galls on roots that initially were bright and frequently varied to dark color. Plants with severe root galling were wilted and died. Samples were collected and transmitted to Plant Protection Organization Lab. in Teharn. All samples were extracted and tested by using Sss monoclonal antibody (Bioreba Co.) in DAS-ELISA method. ELISA tests were positive in symptomatic and positive control but not in healthy potato plant and negative control. Based on the results, the pathogen was identified as Spongospora subterranea f.sp. subterranea J.A. Toml. It is the first report of potato powdery scab disease in Iran. This pathogen in addition to damages caused on potato plants as an important foreign quarantine fungus, can serve as a vector of Potato mop-top virus. Based on the quarantine requirements, all potato plants in greenhouse were eradicated

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