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Chestnut Blight

Chestnut Blight. Cryphonectria parasitica. Life Cycle. Wind-borne ascospores Conidia through rain splash Enters through wounds Grows in the inner bark Cankers. Location. Entire original range of American Chestnut Exists in Europe and Asia Surviving trees remain

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Chestnut Blight

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  1. Chestnut Blight Cryphonectriaparasitica

  2. Life Cycle • Wind-borne ascospores • Conidia through rain splash • Enters through wounds • Grows in the inner bark • Cankers

  3. Location • Entire original range of American Chestnut • Exists in Europe and Asia • Surviving trees remain in Northwest/California

  4. Problems • 4,000,000,000 American chestnut trees lost • 50% of most eastern hardwood forests • Crucial food source • Most surviving trees only exist as sprouts • Disappeared from lumber markets • Rural areas relied heavily on nut harvests

  5. Origin • Asian trees imported into U.S. • Discovered in 1904 • Japanese/Chinese trees were resistant

  6. Range and Spread • Local infections • Up to 50 miles per year • Carried by wind, insects and rain splash • From Mississippi to Maine

  7. Methods of Control • Breeding for resistance • Chinese Chestnut tree • Control imported from Europe • Hypovirulence

  8. Bibliography • "Life Cycle of Chestnut Blight — School of Forest Resources — Penn State University."School of Forest Resources — Penn State University. College of Agricultural Sciences. Web. 21 Sept. 2011. <http://sfr.psu.edu/public/chestnut/breeding/blight/life-cycle/view>. • This source helped me to understand the life cycle of Chestnut Blight through the use of a flow chart. • Worrall, Jim. "Forest Pathology - Chestnut Blight." Forest and Shade Tree Pathology - Home. 27 May 2007. Web. 21 Sept. 2011. <http://www.forestpathology.org/dis_chestnut.html>. • This article provided important information on ways in which the virus is being controlled along with opportunities for hybrid breeding. • Anagnostakis, Sandra L. "CAES: Fact Sheets." CT.gov Portal. Web. 21 Sept. 2011. <http://www.ct.gov/caes/cwp/view.asp?a=2815>. • This site provided me with information on where Chestnut Blight originated. • "The American Chestnut Foundation - Mission & History." The American Chestnut Foundation - Restoring the American Chestnut Tree. Web. 21 Sept. 2011. <http://www.acf.org/history.php>. • This organization is responsible for reviving the population of American chestnuts and provided information on why the American chestnut was so important to society. • "Cryphonectria_parasitica." Columbia University in the City of New York. Web. 21 Sept. 2011. <http://www.columbia.edu/itc/cerc/danoff-burg/invasion_bio/inv_spp_summ/Cryphonectria_parasitica.htm>. • This site detailed the current range of Chestnut Blight

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