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American Potato Journal

, Volume 62, Issue 4, pp 173–176 | Cite as

Potato early dying disease in the Pacific Northwest caused byErwinia carotovora pv.carotovora andE. carotovora pv.atroseptica

  • Mary L. Powelson
Article

Abstract

Premature death of potato vines is widespread in irrigated potato fields of the Pacific Northwest.Verticillium dahliae is a major cause of early dying in fields with a history of potato production, but in fields new to potato production, or those that have been fumigated and have a lowV. dahliae population in the soil, premature death of vines can also occur.Erwinia carotovora pv.carotovora (Ecc) andE. carotovora pv.atroseptica (Eca) have been implicated in the early dying disease syndrome in these fields. Both bacterial pathogens are associated with symptoms similar to those caused byV. dahliae; i.e., a progressive chlorosis and necrosis of the foliage and vascular discoloration that may extend a short distance up the stem. Greenhouse pathogenicity studies on cv. Russet Burbank cuttings in which symptom development was identical to that produced byV. dahliae have verified thatEcc andEca can cause potato early dying.

Key Words

Potato early dying Erwinia carotovora pv carotovora E. carotovora pv. atroseptica multipathogen interactions 

Resumen

La muerte prematura del rastrojo de la papa (MPP) es común en suelos irrigados del Pacifico noroccidental.Verticillium dahliae es la causa principal de la MPP en campos con historial de producción de papa, pero la MPP también puede ocurrir en campos nuevos para este cultivo, o en aquéllos qu han sido fumigados y tienen una población baja deV. dahliae en el suelo.Erwinia carotovora pv.carotovora (Ecc) yE. carotovora pv.atroseptica (Eca) nan sido relacionados con la MPP en éstos últimos campos. Ambos patógenos bacterianos están asociados con sintomas similares a los causados porV. dahliae, tales como clorosis progresiva y necrosis del follaje y descoloración vascular que se puede extender un poco por el tallo mismo. En estudios de invernadero con esquejes del cultivar Russet Burbank, se observó que el desarrollo de los síntomas fue idéntico al producido porV. dahliae con lo cual se ha verificado que Ecc y Eca pueden causar la muerte prematura de la papa.

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Copyright information

© Springer 1985

Authors and Affiliations

  • Mary L. Powelson
    • 1
  1. 1.Department of Botany and Plant PathologyOregon State UniversityCorvallis

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