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WELCOME TO ALL. Prof. M. Ashrafuzzaman Dept. Plant Pathology, BAU. Four Phases. Ancient period Dark period Renaissance period Modern period. History of Plant Pathology. Ancient Period. Theophrastus (300-286 B.C.)
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WELCOMETO ALL Prof. M. Ashrafuzzaman Dept. Plant Pathology, BAU
Four Phases Ancient period Dark period Renaissance period Modern period History of Plant Pathology
Ancient Period • Theophrastus (300-286 B.C.) • Study and write about the diseases of trees, cereals and legumes in his book enquiry into plants • His approach was observational and speculative rather than experimental. • Theory of spontaneous generation Father of botany
DARK PERIOD • 300AD and 1300AD • Also called pre-renaissance period in history • no increase in the knowledge of plant pathology
PRE-MODERN/ RENAISSANCE PERIOD/AUTOGENIC ERA (17th –mid 19th) • 1675 A. D.-Anton van Leeuwenhoek (Holland) • Invented compound microscope in 1675 • In 1683 he described bacteria seen with this microscope
1729 A. D.-Pier Antonio Micheli (Italian) • Observed fungal spores for the first time and conducted many spore germination studies in 1729 • He published a book “Nova Plantarum Genera” in which he gave descriptions about 1900 species in Latin out of which 900 were fungi. Father of Mycology.
3) 1755 A. D.-Tillet (French) • Published a paper on bunt or stinking smut of wheat • He reported the chemical treatment of seeds
MODERN PERIOD/ GOLDEN ERA/PATHOGENIC ERA (1800 – 1900) • IRIS FAMINE • In 1845, the potato crop in Ireland was completely wiped out by late blight disease • caused great famine in 1846. • This resulted in the death of hundreds of thousands of people • immigration of more than one and a half million Irish to United States.
4) 1853 A. D.-Anton De Bary (Germany) • established that fungi are the causes, not result of plant diseases • renamed the casual organism of late blight as Phytophthora infestans. • He discovered heteroecious nature of rust fungi • Detailed life cycles of downy mildew • He wrote a book named “Morphology and Physiology of fungi, lichens and Myxomycetes” (1866). • father modern Mycology
8) 1879 A. D.- Robert Koch • Established the germ theory • Germ theory • diseases are caused by the presence and actions of specific micro-organisms • that microorganisms are the cause of many diseases.
8) 1889 A. D. Beijerinck (Dutch) • proved that the virus is not a living microorganism. • N.A. Cobb • Contributed a lot to nematode morphology, taxonomy and methodology • Founder of virology • Founder of nematology
Paul Neergaard • Father of seed pathology
Bengal Famine 1943 Brown spot diseases
Bangladesh perspective • Department of plant pathology • Seed Pathology Centre • Plant Disease diagnostic Clinic
Today’ Plant Pathology • Some major trends were in the following areas: • Physiological plant pathology • Genetics of the host and the pathogens • Environment and its relation to plant disease • Nature of disease resistance in plants • Biochemistry and physiology of the diseased plants • Tissue culture in plant pathology • Ecological study of plant pathogens • Integrated plant disease management • Biotechnology and genetic engineering