Overview
I. History of plant diseases and significance
of plant pathology
II. Symptoms of diseases as a reflection of
disturbed physiological function
III. Essential plant pathology concepts
IV.Causes of plant disease
V. Plant-pathogen interactions
VI. Plant defense mechanism
Ancient history
http://www.the-romans.co.uk/g4/13a.triple_sacrifice_large.jpg
Theophrastus
Father of botany-(Historia
plantarum)
317-287 B.C.
http://en.wikipedia.org/
Middle Ages -Renaissance
Plant diseases contribute to famines
Ergot fungus-witchery
http://en.wikipedia.org/
Robert Hooke (1635-1703)
Father of microscopy
Coins term “cell”
Great Irish Famine (1845-1852)
http://www.nysaes.cornell.edu/
http://www.reformation.org/irish_famine.html
Modern times
Robert Hartig (1839-1901) Robert Koch (1843-1910)
Heinrich Anton de Bary
Father of forest pathology Father of microbiology
(1831-1888)
Developed Koch’s postulates
Wrote 1st textbook
Father of plant pathology
for proof of pathogenicity
Evidence against “spontaneous
generation”
http://en.wikipedia.org/
Introduced forest diseases of great impact to
North American ecosystems
Laurel wilt (2003)
Sudden oak death (1995)
Butternut canker (1960s)
Dutch elm disease (1930)
http://www.forestryimages.org/diseases.cfm
White pine blister rust (1906) Chestnut blight (1904)
Diseases in the news
• http://www.sciencedaily.com/releases/2008/
04/080402151409.htm
• http://www.guardian.co.uk/environment/20
09/mar/19/rust-fungus-global-wheat-crops
Injury vs. Disease
Symptoms
Signs
References
• Chapter 1in Manion, P.D. 1991. Tree
disease concepts. Prentice-Hall, NJ, USA.
402 p.
• Chapters 1 &9 in Schumann G.L., D’Arcy
C. 2006. Essential Plant Pathology. APS
Press, St. Paul MN.
• http://www.apsnet.org/education/top.html
• http://tomvolkfungi.net/
• http://www.wikipedia.org/