Detection and Quantification of Sporosori in Soil by Quantitative Real-Time PCR.

Powdery scab on potato tubers is caused by the obligate soilborne biotroph and is known to cause substantial losses in potato production. The pathogen also infects roots of susceptible hosts, forming galls which can negatively affect root function. is also the vector of , which causes a tuber necrosis disease that can, depending on temperature and cultivar, render potato tubers unmarketable.

Sensitivity of Potato Cultivars to Potato mop-top virus-Induced Tuber Necrosis.

Potato (Solanum tuberosum) cultivars representing four market classes were assessed for sensitivity to Potato mop-top virus (PMTV)-induced tuber necrosis in three separate trials in a field in North Dakota known to be infested with PMTV. Reverse-transcription polymerase chain reaction confirmed the presence of PMTV in randomly selected samples. Results of tuber necrosis assessments conducted during storage demonstrated that sensitivity to PMTV-induced tuber necrosis among cultivars follows a continuum of tolerant to sensitive.