|
|
NPDN Governance Committee Report NPDN Regional Network Meeting Notes |
NPDN National Meeting 2007 Poster Abstract Authors: JAN BYRNE Affiliations: Michigan State Univ, Diagnostic Services, East Lansing, MI, USA Potato wart, caused by Synchytrium endobioticum is on the list of USDA PPQ Select Agents and Toxins, and is an important quarantine pest throughout the world. The pathogen is established in parts of Asia, Africa, Europe, South America, and New Zealand. S. endobioticum is also found in soils in Newfoundland, Canada where strict quarantines are in place. Disease symptoms include lumpy gall-like growths; galls form on stem tissue, stolon buds and tuber eyes. Galls formed below ground are white and fleshy, galls begin to decay and turn color with age. Three spore types are produced: zoospores, summer sporangia and winter sporangia. Sporangia are formed within host cells of diseased tissue. Diagnostic characteristics of winter sporangia include their size (35 – 80 µm), golden brown color, thick wall, and angular appearance. Potato wart is spread by infected seed tubers and by movement of infested soil. Chemical soil treatments are not a viable option to eradicate sporangia, which can persist for up to 20 years in soil. Exclusion of the pathogen from non-infested areas is the most efficient method of disease control. NPDN diagnosticians in potato growing areas of the U.S. would benefit from diagnostic training to enhance their abilities to diagnose S. endobioticum.View Poster
Back to Poster Presentations
Privacy Policy
|
Copyright © 2012
|
Disclaimer
|
