Back to
Focus on

Brown Spot of Potato

February 2013

By Dennis A. Johnson, Ph.D.
Extension Plant Pathologist
Washington State University
Phone: 509-335-3753

Watch Presentation (15 min)

for PC and Android | for Apple devices



Summary: This presentation provides an overview of brown spot of potato. It is intended to help growers, consultants, and students to better understand the epidemiology of the disease and how it can be managed. The presentation shows representative color images of disease symptoms, the pathogen on potential overwintering substrates, and defines environmental and plant growth factors that lead to the development of the disease. The aggressiveness of the brown spot (Alternaria alternata) and early bight (Alternaria solani) pathogens are compared. Brown spot management tactics are discussed.

Note: These presentations are best viewed at 1024 x 768 resolution. Best audio is achieved with a sound card and audio speakers/earphones. Download Adobe Flash Player if presentation is not viewable.

Responsibility: All presentations published on The Plant Management Network reflect individual views of the author/presenter(s) and are not an official position of The Plant Management Network or the author/presenter(s)' affiliated institutions, companies, or organizations. No endorsement of products or companies, institutions, or organizations is intended, nor is criticism implied of those not mentioned. Individuals using agricultural products or any products referenced by The Plant Management Network or its partners, sponsors, or advertisers, should ensure that the intended use complies with current regulations and laws, as well as conforms to the product label.

Privacy Policy   |   Copyright © 2019

Disclaimer   |   Contact Us