American Potato Journal

, Volume 60, Issue 4, pp 235–243 | Cite as

Association of viral, bacterial and fungal pathogens with vascular discoloration of Russet Burbank potato tubers

  • R. G. Clarke
  • M. L. Powelson
  • L. Beraha


Russet Burbank potatoes from the 1979 and 1980 crop years, collected from Chicago, IL repack warehouses and retail markets, were sampled for vascular discoloration. The amount of discoloration varied among sampling months and states of origin and decreased from 7.7% in 1979 to 1.6% in 1980. Highest levels of vascular discoloration were detected in December and January samples.

Vascular discolored and non-discolored (control) tubers were assayed for the presence of potato leafroll, potato virus X, and beet western yellows viruses by the enzyme-linked immunosorbent assay (ELISA). Tubers were also assayed for 2 subspecies ofErwinia carotovora and forVerticillium albo-atrum andV. dahliae. Potato leafroll virus was detected in 31 of 831 vascular discolored tubers.V. albo-atrum was detected in 1 of 180 discolored tubers. Beet western yellows virus was not detected in discolored or non-discolored tubers. Two subspecies ofE. carotovora and potato virus X were equally common in discolored and non-discolored tubers.

Key Words

Potato tubers pathogens vascular discoloration 


En centrales de embalaje y en mercados minoristas de Chicago, Illinois, se recogieron muestras de papa, de las cosechas de 1979 y 1980 de la variedad de Russet Burbank, para pruebas de descoloración vascular. El grado de descoloración varió con los meses de muestreo y los lugares de origen, se redujo de 7.7% en 1979 a 1.6% en 1980. Los niveles más altos de descoloración vascular fueron detectados de las muestras de diciembre y de enero.

Mediante ELISA fueron examinados tubérculos con descoloración vascular y sin descoloración (tubérculos testigos), para verificar la presencia de virus del enrollamiento de las hojas de la papa PLRV, de virus X de la papa y de virus del amarillamiento occidental de la remolacha (“beet western yellows”). También fueron sometidas a prueba dos subespecies deErwinia carotovora yVerticillium albo-atrum yV. dahliae. Se detectó el virus del enrollamiento de las hojas en 31 de 831 tubérculos con descoloración vascular. En 1 de 180 tubérculos descolorados se detectóV. albo-atrum. No se detectó virus de amarillamiento dental de la remolacha (“beet western yellows”) en tubérculos con descoloración o sin descoloracion. Fue frecuente la presencia de dos subespecies deE. carotovora y del virus X de la papa tanto en tubérculos descolorados como en los sin descoloración


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Copyright information

© Springer 1983

Authors and Affiliations

  • R. G. Clarke
    • 1
    • 2
  • M. L. Powelson
    • 3
  • L. Beraha
    • 4
  1. 1.Department of EntomologyOregon State UniversityUSA
  2. 2.Idaho Crop Improvement AssociationIdaho Falls
  3. 3.Department of Botany and Plant PathologyOregon State UniversityCorvallis
  4. 4.Market Pathology LaboratoryUSDAChicago

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