Bacterial Ring Rot
Fact sheets and articles have been published by several universities. A few examples are linked here:
Recognizing and Managing Bacterial Ring Rot by Phil Nolte of the University of Idaho.
Cleaning and Disinfecting Potato Equipment and Storage Facilities by Nora Olsen and Phil Nolte of the University of Idaho.
UC Pest Management Guidelines: Bacterial Ring Rot from University of California UC IPM Online
Focus on Potato has posted a webinar on bacterial ring rot by Dr. Neil Gudmestad of North Dakotah State University. (In order to view the webinar you must be a member of the Plant Management Network.)