PLPA 3004 Lecture Notes - Lecture 3: Silvering, Heart Rot, Hypertrophy
25 Sep 2016
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Birth of plant pathology: late blight of potato p 19-20, 421-426. Potato introduced from south central america to europe 1570 and well established crop in ireland. Farmers used to pay rent, farmers dependent for sustenance and survival with potato. Stored tubers for winter in shallow ditches, then grew well for years. 1845 favorable weather, then europe and ireland cloudy, wetter, and cooler for weeks. Crops showed blighted leaves and shoots, then whole plants died. Next winter tubers in ground rotten, masses of rotting tubers in ditches, nothing else to eat. 1846, corn imported from us, 1 million irish died from hunger, many left ireland to us. Theory of spontaneous generation doctors suggested as mildew fungus growth affected leaves, stems, tubers. Dr. j lindley, proposed incorrectly that plants over absorbed water from rains and tissue would swell and rot. Miles berkeley noticed mold covering plants and labeled fungus (oomycete)
