Spongospora subterranea en papa pdf merge

Pdf improved diagnosis of powdery scab spongospora. Improved diagnosis of powdery scab spongospora subterranea. Based on visual inspection, discrimination between common scab streptomyces spp. It is caused by the cercozoan spongospora subterranea f. Monitoring spongospora subterranea development in potato. During 19941996 surveys were performed in the netherlands on tubers with symptoms resembling common scab.

Taller diagnostico spongospora subterranea en papa. Seedlings of the plants were grown in nutrient solutions and inoculated with spore balls ofs. These spores can be detected through bioassays, pcr, and antibody methods. Field evaluation of potato genotypes for resistance to. Powdery scab affects most potato production zones in the world. Class project for pp 728, soilborne plant pathogens, fall 2012 introduction. 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. Field evaluation of potato genotypes for resistance to powdery scab on tubers and root gall formation caused by spongospora subterranea francisco g. A new distribution map is provided for spongospora subterranea wallr. Interrelationships and phylogeny of the aquatic phycomicetes. Hairy nightshade is an alternative host of spongospora. A description is provided for spongospora subterranea f. Global genetics and invasion history of the potato powdery. Spongospora subterranea sponsuoverview eppo global database.

Determination of optimal conditions for spongospora subterranea zoospore release on. This study was performed to determine the host range ofspongospora subterranea f. Autrefois classe parmi les champignons, cet organisme est aujourdhui rattache aux protozoaires division rhizaria, embranchement cercozoa. 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. Its success is attributed to the characteristics of its pathogen and features of its life cycle. The roots were microscopically examined for the presence of plasmodia or zoosporangia 14 days after inoculation.

Duncan, scottish crop research institute, invergowrie, dundee dd2 5da, scotland, uk. Inspections are performed on unwashed samples, incidentally supported by microscopic examination. Detection of dna specific sequences of spongospora. Duncan, scottish crop research institute, invergowrie, dundee dd2 5da, scotland, uk introduction powdery scab, caused by spongospora subterranea f. Project report epidemiology, autecology and control of spongospora subterranea, cause of potato powdery scab ref. Sintomas y signos producidos por spongospora subterranea f. Marcela villegas ochoa2 y elena paola gonzalez jaimes3 resumen. Three diseases of potato caused by spongospora subterranea. Effect of environmental vectors on infection of potato by spongospora subterranea f. Tecaphora solani ralstonia solanacearum pectobacterium carotovorum p.

Detection and quantification of spongospora subterranea f. Resistance of potato to powdery scab spongospora subterranea under andean field conditions. Production of cystosori of spongospora subterranea walk. Cookies are small text files that contain a string of characters and uniquely identifies a browser. Spongospora subterranea is an obligate biotroph and therefore requires a living host and cannot be cultured in vitro. Symptoms of powdery scab include small lesions in the early stages of the disease, progressing to raised pustules containing a powdery mass. Egan, department of environmental resource management, national university of ireland, belfield, dublin 4, ireland introduction the plasmodiophorid spongospora subterranea f. Detection in the soil and on tubers is based on the presence of sporosori, the resting spores of the pathogen. Pdf detection and quantification of spongospora subterranea. 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. They are sent to a computer by website operators or third parties. Effect of environmental vectors on infection of potato by. Spongospora subterranea is the causal agent of powdery scab on potato. Epidemiology and control of spongospora subterranea f.