Detection and quantification of spongospora subterranea f. Monitoring spongospora subterranea development in potato. Pdf improved diagnosis of powdery scab spongospora. Interrelationships and phylogeny of the aquatic phycomicetes. It is caused by the cercozoan spongospora subterranea f. Seedlings of the plants were grown in nutrient solutions and inoculated with spore balls ofs. A description is provided for spongospora subterranea f. Symptoms of powdery scab include small lesions in the early stages of the disease, progressing to raised pustules containing a powdery mass.
Detection of dna specific sequences of spongospora. During 19941996 surveys were performed in the netherlands on tubers with symptoms resembling common scab. Taller diagnostico spongospora subterranea en papa. Resistance of potato to powdery scab spongospora subterranea under andean field conditions.
Spongospora subterranea sponsuoverview eppo global database. Improved diagnosis of powdery scab spongospora subterranea. Marcela villegas ochoa2 y elena paola gonzalez jaimes3 resumen. Epidemiology of spongospora subterranea, the cause of. Iftikhar et al characterization of spongospora subterranea f sp subterranea root hair and epidermal cells of roots under a stereomicroscope with 20fold magnificatiarn rating of root infection done on 04 scale of marz 1989, vvhsre 0 no sporangia, 1 only a fevv sporangia, several roots with sporangia, 3 sporangia regularly. Sintomas y signos producidos por spongospora subterranea f. Investigating factors affecting infection of potato by. Parbery school of agriculture and forestry, university of melbourne, parkville 3052, australia evidence that potato tubers are susceptible to infection by spongospora subterranea only during lenticel formation and proliferation is presented and the capacity of apparently. A new distribution map is provided for spongospora subterranea wallr.
Production of cystosori of spongospora subterranea walk. Its success is attributed to the characteristics of its pathogen and features of its life cycle. Field evaluation of potato genotypes for resistance to powdery scab on tubers and root gall formation caused by spongospora subterranea francisco g. Pdf detection and quantification of spongospora subterranea. Project report epidemiology, autecology and control of spongospora subterranea, cause of potato powdery scab ref. Powdery scab effect on the potato solanum tuberosum ssp. Infection of potato by spongospora subterranea sciencedirect.
Spongospora subterranea is an obligate biotroph and therefore requires a living host and cannot be cultured in vitro. These spores can be detected through bioassays, pcr, and antibody methods. Effect of environmental vectors on infection of potato by spongospora subterranea f. This study was performed to determine the host range ofspongospora subterranea f. Powdery scab, caused by the obligate plasmodiophorale fungus spongospora subterranea, has become an important disease for potato production worldwide. Transactions of the british mycological society, 41. Investigating factors affecting infection of potato by spongospora subterranea alison lees, louise sullivan and jennie brierley plant pathology, scri, invergowrie, dundee, dd2 5da, uk conclusions and future work dna of s. Determination of optimal conditions for spongospora subterranea zoospore release on. Three diseases of potato caused by spongospora subterranea. Global genetic characterisation of the powdery scab pathogen introduction powdery scab is one of the most serious diseases of potatoes wherever intensive potato cropping is carried out.
Epidemiology and control of spongospora subterranea f. Powdery scab affects most potato production zones in the world. Hairy nightshade is an alternative host of spongospora. Global genetics and invasion history of the potato powdery. Though this disease can reduce yield somewhat, the true economic effect is due to the unmarketable, scabbed appearance figure 1 as well as rejection of tubers as seed to prevent. Duncan, scottish crop research institute, invergowrie, dundee dd2 5da, scotland, uk. Tecaphora solani ralstonia solanacearum pectobacterium carotovorum p. Autrefois classe parmi les champignons, cet organisme est aujourdhui rattache aux protozoaires division rhizaria, embranchement cercozoa. Detection in the soil and on tubers is based on the presence of sporosori, the resting spores of the pathogen. Inspections are performed on unwashed samples, incidentally supported by microscopic examination. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. Based on visual inspection, discrimination between common scab streptomyces spp. Pt303 epidemiology and control of powdery scab of potatoes.
They are sent to a computer by website operators or third parties. Class project for pp 728, soilborne plant pathogens, fall 2012 introduction. Egan, department of environmental resource management, national university of ireland, belfield, dublin 4, ireland introduction the plasmodiophorid spongospora subterranea f. Duncan, scottish crop research institute, invergowrie, dundee dd2 5da, scotland, uk introduction powdery scab, caused by spongospora subterranea f. Spongospora subterranea is the causal agent of powdery scab on potato. Field evaluation of potato genotypes for resistance to. Effect of environmental vectors on infection of potato by. Cookies are small text files that contain a string of characters and uniquely identifies a browser.
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