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By: Christine Yin

Dogwood Anthracnose. By: Christine Yin. Discula destructiva. Kingdom: Fungi Phylum: Ascomycota Class: Sordariomycetes Subclass: Sordariomycetidae Order: Diaporthales Family: Valsaceae Genus: Discula Species: Destructiva. What is Discula destructiva ?.

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By: Christine Yin

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  1. Dogwood Anthracnose By: Christine Yin

  2. Discula destructiva • Kingdom: Fungi • Phylum: Ascomycota • Class: Sordariomycetes • Subclass: Sordariomycetidae • Order: Diaporthales • Family: Valsaceae • Genus: Discula • Species: Destructiva

  3. What is Disculadestructiva? • Fungal infection that affects only dogwood • Can be fatal

  4. Life Cycle of Disculadestructiva • The reproductive structures of the fungi remain on leaves and twigs through winter • New growth is infected • Rainy weather will spread the infection

  5. Effects on Dogwood • Causes blotching of the leaves and flowers • Cankers on the branches • Affected trees do not drop their leaves in winter • Leaves are gray and crumpled

  6. Effects, cont. • Serious infection can cause the tree to defoliate • Terminal twigs killed • Can spread down to branches and effectively destroy leaf buds • Can eventually kill the tree or weaken it and make it prone to more infection

  7. Origin • Origin is unknown • Theories: environmental change could have change the relationship between the tree and a parasite that was harmless before OR the fungus Discula sp. was introduced • Has been found on the East Coast and Pacific North West of the US • Caused by the agent Discula sp.

  8. Distribution • First discovered in Washington in 1776 • Found in NY two years later • Spread down Applachian fairly quickly • Has been found on 120 acres of land

  9. Rate of Distribution • From 1988 to 1991, the number of plots severely affected increased by 638% • South – damage worst at elevations above 3000 ft

  10. Why should we care? • Affects the tourism of the Southern Appalachians • Animals such as deer, squirrels, turkey, and many more rely on the berries for fat and protein, and the leaves for calcium • The loss of dogwood trees will have an impact on other organisms

  11. Prevention, Control and Maintenance • Monitor the trees • Prune diseased leaves or branches • Plant the trees in the right locations • Plant disculadestructivaresistant trees • Avoid using lots of nitrogen rich fertilizers • Encourages new sprouts which are vulnerable • Use fungicides when they are needed

  12. Fungi free dogwood tree!

  13. Works Cited • "How to Identify and Control Dogwood Anthracnose." Northeastern Area State & Private Forestry - USDA Forest Service. Web. 20 Sept. 2011. <http://www.na.fs.fed.us/>. • "HGIC 2003 Dogwood Diseases & Insect Pests : Extension : Clemson University : South Carolina." <Clemson University.> Web. 20 Sept. 2011. <http://www.clemson.edu/>. • "Dogwood Anthracnose." hortanswers. University of Illinois., Web. 20 Sept. 2011. <http://urbanext.illinois.edu/>. • "Dogwood Anthracnose." Plant Pathology. NC State University, Web. 20 Sept. 2011. <www.cals.ncsu.edu/>. • ther, R.S., R.M. Davidson, and Jr. 1979. Dogwood anthracnose. Ornamentals Northwest Newsletter. "Dogwood Anthracnose - eXtension." eXtension - Objective. Research-based. Credible.. PennState University: College of Agricultural Sciences, n.d. Web. 20 Sept. 2011. <http://www.extension.org/>.

  14. Works Cited cont. • (Media) "Pink Dogwood Tree Bokeh | Trees| Free Nature Picture Photography." ForestWander Free Nature Picture Photography. West Virginia. Web. 20 Sept. 2011. <http://www.forestwander.com/>. • "Forest Scenery Nature Pictures and Photography - Flowers - pink-dogwood-tree-flower." Forest Scenery Nature Pictures and Photography - Forest Scene Gallery. ForestWander Nature Photography.Web. 21 Sept. 2011. <http://www.forestscene.com/>.

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