•Also be referred as “PHYTOPATHOLOGY”. •A science that study plant disease •The disease are caused by pathogens (infectious diseases) and environmental conditions (physiological factors) •Improve the chances of plant survival

1. Plant Pathology
(Phytopathology)
History & Development

2. Outline
 •Plant pathology definition
 •Plant disease definition
 •Plant diseases classification

3. Plant Pathology
•Also be referred as “PHYTOPATHOLOGY”.
•A science that study plant disease
•The disease are caused by pathogens
(infectious diseases) and environmental
conditions (physiological factors)
•Improve the chances of plant survival

4. Plant Disease
“Disease is a malfunctioning process which is
caused by some continuous irritation in which
result some suffering producing symptoms”

5. Healthy Plant Vs. Diseased plant

7. Classification of plant disease
 Infectious
 Non-infectious

8. Infectious disease
 A disease that is caused by a pathogen that can spread
from a diseased to healthy plant
 Disease that is caused by living organism.
E.g. Pectobacterium atrosepticum (potato pathogen)

9. Non infectious disease
 •Disease that is caused by non living organism
 •Could not be spread to other healthy plant
 E.g. Factors:
 Too low/High Temperature
 Lack/Excess of soil moisture
 Air Pollution
 Nutrient Deficiencies
 Mineral toxicities
 Soil acidity or alkalinity

10. History of Plant Physiology
 1675 - Dutch worker Anton von Leeuwenhoek
developed the first microscope.
 1729 - Italian botanist P. A. Micheli proposed fungi
comes from spores; father of Mycology
 1845 - Irish Potato famine due to Phytophthora
infestans caused starvation of million and immigration
of 1.5 million people.
 1861 -Anton de Bary (Germany) worked out the life
cycle of potato late blight and first to prove
experimentally Phytophthora infestans is the cause of
potato late blight.
He is the Father of Modern Plant Pathology
Mycology and Development of plant pathology

11.  1904 – R. H. Biffen first to show that resistance to
pathogens in plants can be inherited as a
Mendelian character; pioneer in genetics of plant
disease resistance.
 1918 -E.J.Butler published book on Fungi and
Disease in Plants; he made exhaustive study on
Indian fungi and the diseases caused by them.
 Father of Modern Plant Pathology in India

12.  D. D. Conninghum & A. Barclay – Start study and
identification of fungi.
 J. F. Dastur (1886-1971)- First Indian Plant
Pathologist. He worked on Caster and Potato diseases
caused by Phytophthora.
 B. B. Mundkar (1948)– He worked on development of
disease resistant varieties against wilt of cotton and
identification and classification of Indian smut fungi.
Established Indian Phytopathological Society in New
Delhi.
 ● K. C. Meheta – Worked on Rust in India.
 ● S. P. Raychoudhary- Worked on Viral plant diseases.
 ● Y. L. Nene- Reported Khaira Disease of rice.
 ● R. S. Singh- Wrote a famous book - ‘Plant Disease’.

13. Prepared By:
Taichi_RyuZaki