WELCOMEWELCOMETO TO ALLALL

Prof. M. AshrafuzzamanDept. Plant Pathology, BAU

Four PhasesFour Phases

1.1. Ancient periodAncient period2.2. Dark periodDark period3.3. Renaissance periodRenaissance period4.4. Modern periodModern period

History of Plant PathologyHistory of Plant Pathology

Ancient PeriodTheophrastus (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

300AD and 1300AD 300AD and 1300AD Also called pre-renaissance period in Also called pre-renaissance period in

historyhistoryno increase in the knowledge of plant no increase in the knowledge of plant

pathology pathology

DARK PERIOD

1675 A. D.-Anton van 1675 A. D.-Anton van Leeuwenhoek (Holland)Leeuwenhoek (Holland)

Invented compound microscope in Invented compound microscope in 16751675

In 1683 he described bacteria seen In 1683 he described bacteria seen with this microscopewith this microscope

PRE-MODERN/ RENAISSANCE PERIOD/AUTOGENIC ERA (17th –mid 19th)

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

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.

MODERN PERIOD/ GOLDEN ERA/PATHOGENIC ERA (1800 – 1900)

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).

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 pathogensIntegrated plant disease management

Biotechnology and genetic engineering

THANKS TO ALLTHANKS TO ALL