Last lecture we discussed

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Last lecture we discussed How important are
plants?   What is disease?   What agents
cause diseases?  How do we recognize and
characterize diseases? What are the requirements
for disease to occur?  
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European mistletoe - Viscum album
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Loose smut of wheat - Ustilago tritici
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Famine reached its peak in 1847
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Potato acreage
Potato yields per acre
Potato production
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Evictions
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Destruction of homes insured evictions
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Coffin ships
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Population change, 1841-51
Population doubled between 1750 and
1845 Population of 8-9 million in 1845 0.8
million deaths Immigration Continued decline
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Cork Society of Friends Soup Kitchen
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Charge of the Light Brigade
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Sugarcane rust Puccinia melanocephela
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Sugarcane smut Ustilago scitaminea
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Tobaco Mosaic Virus Adolph Mayer, Beijerinck,
Ivanowski, Stanley
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