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Posted Date: 18 Oct 2009 Posted By: Manish Jain Member Level: Diamond
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2006 Madras University B.Sc Bio-Technology Modern Plant Pathology Question paper
Semester V - Application Oriented Subject I - Modern Plant Pathology
Time: Three hours
Maximum 100 marks
SECTION - A [10 x 3 = Marks 30]
Answer any TEN questions. All questions carry equal marks.
Each answer should not exceed 50 words. Draw diagrams wherever necessary.
1. Plant quarantine.
2. Symptometology
3. Pathogen.
4. Epiphytotic disease.
5. Prophylaxis.
6. Fungicides.
7. Disease syndrome.
8. Necrosis.
9. Immunization.
10. Sanitation.
11. Resistance genes.
12. Protectant.
SECTION - B [5 x 6 = Marks 30]
Answer any FIVE questions. All question carry equal marks.
Each answer should not exceed 200 words
13. Describe the importance of disease forecast
14. Write an account on cellulolytic enzymes.
15. Describe the history of plant pathology.
16. What are Koch's postulates?
17. Describe the host parasite interactions.
18. Give a brief account of Citrus canker disease.
19. Describe the detection of plant pathogens using molecular tools.
SECTION - C [4 x 10 = Marks 40]
Answer any FOUR questions. All questions carry equal marks.
Each answer should not exceed 500 words.
20. Write an account on the symptoms, causal organisms and control measures of Wilt of Cotton.
21. Explain the types of disease caused by fungi in crop plants.
22. Write an essay on toxins and their role in plant diseases.
23. Explain the mechanism of infection.
24. Explain the dissemination of plant pathogens.
25. Give an account of leaf curl of Papaya.
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