​​​Potato Late Blight

May 2010 | 12 min., 51 sec.
by Steve Johnson
The University of Maine


​This presentation will help consultants, growers, practitioners, and allied industries in all regions that deal with potatoes understand the devastating disease of late blight. The presentation shows representative color photos of the all aspects of the disease, explains the cause and disease cycle, defines the factors leading to disease, and presents management practices that will reduce losses owing to late blight.​

About the Presenter

Steve JohnsonSteve Johnson is an Extension Professor and Extension Potato Specialist with the University of Maine. Steve has a PhD from the University of Florida, an MS degree from the University of Maine at Orono, and a BS degree from the University of Wisconsin-Madison, all in plant pathology. His responsibilities in Maine are potato diseases, and potato late blight occupies a major portion of his time. When the crop is not in the field, potato storage disorders are a focus of his efforts.​

Contact Information:
Email: stevenj@maine.edu


In 2020, Grow webcasts had more than 110,000 views. Help support our mission to provide comprehensive high-quality, science-based resources to and for plant health researchers and practitioners at no cost.

PDMR submission guidelines and schedule information are available online.


Plant Health Progress is a peer-reviewed multidiciplinary, online journal of applied plant health.