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Bota 251: Introduction To Plant Pathology Question Paper

Bota 251: Introduction To Plant Pathology

Course:Bachelor Of Science

Institution: Egerton University question papers

Exam Year:2011

SECTION A: ANSWER ALL QUESTIONS

1. Differentiate between the following terminologies as used in plant pathology. (10 Marks)
a. Septate and aseptate hyphae
b. Hypertrophy and hyperplasia
c. Local and latent infection
d. Fluorescent and non-fluorescent Pseudomonas
2. Name any two genera of fungi that transmit viruses and any two nematode genera that transmit Tobraviruses. (5 Marks)
3. Farmers in your area have brought to your attention a previously unknown disease of their crop plants.
(a) How would you identify the casual agent? (1 Mark)
(b) If the pathogen identified in (a) above has not been known to cause such a disease, what action would you take
to verify that is indeed responsible for the disease. (4 Marks)
4.(a) Discuss the various types of fruiting bodies (Ascocarps). Illustrate and give examples. (8 Marks)
(b) List two fungal genera that fall under Ustilaginales. (The Smut Fungi) (2 Marks)
5.(a) List any three factors that may influence nematode distribution in the soil. (3 Marks)
(b) In addition to their own movement, name any four agents that can spread nematodes in a given field. (4 Marks)
(c) List any three Dorylaimid nematodes which are migratory ectoparasites of plants. (3 Marks)

SECTION B:ANSWER TWO QUESTIONS ONLY

6. Plant viruses are transmitted from plant to plant in a number of ways. Discuss. (15 Marks)
7. Briefly outline the Host-parasite relationship between plant parasitic nematodes and their hosts. (15 Marks)
8. Discuss in detail any five methods of Plant disease control. (15 Marks)

Bota 251: Introduction To Plant Pathology Question Paper

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