N A L A N D A O P E N U N I V E R S I T Y
M.Sc. Botany, Part-I
PAPER-III
(Plant Pathology)
Annual Examination, 2018
Time 3 Hours. Full Marks 80
Answer any Five Questions. All questions carry equal marks.
1. What do you understand by the term resistance for a disease in Plants. Describe different
kinds of disease resistance found in plants.
2. Classify plant diseases on various criteria.
3. Give an account of organic fungicides. What are qualities of good organic fungicides
4. Describe the general process of infection by plant pathogens, with special reference to fungi.
5. Describe symptoms, etiology, disease cycle and control measures for Black or Stem rust of
Wheat.
6. Write short notes on any Two of the following
Pre-disposing factor
Mixed cropping and its significance
Disease Forecasting System
Hypertrophy and Hyperplasia as disease symptom
7. Describe Symptoms, disease cycle, etiology and control measures of Loose Smut of Wheat.
8. Write short notes on any Two of the following
Hot water treatment for disease control
Endemic disease
Genetic engineering and plant pathology
Robert Koch and his postulates
9. What is plant quarantine How quarantine regulation can help in disease control.
10. Write pathological notes on any two of the following
Red rot of sugarcane
Late blight of potato
Die back of Chilli
Fungus causing white rust of crucifers