Agro 233/133: Crop Entomology Question Paper

Agro 233/133: Crop Entomology

Course:Bachelor Of Science In Horticulture

Institution: Chuka University question papers

Exam Year:2013

CHUKA

UNIVERSITY

UNIVERSITY EXAMINATIONS
SECOND YEAR EXAMINATION FOR THE AWARD OF
DEGREE OF BACHELOR OF SCIENCE HORTICULTURE

AGRO 233/133: CROP ENTOMOLOGY

STREAMS: BSC (HORT) Y2S1 TIME: 2 HOURS

DAY/DATE: WEDNESDAY 14/8/2013 11.30AM – 1.30 PM
INSTRUCTIONS:

1. This Paper has two Sections A and B
2. Section A accounts for 30 Marks while Section B accounts for 40 Marks
3. Section A is Compulsory
4. Answer any Two Questions in Section B

SECTION A

1. Explain the following terms: [10 Marks]

(a) Pest
(b) Insect
(c) IPM
(d) Pathogen
(e) Host

2. Describe how legislation can be used as a strategy to control pests. [5 Marks]

3. Describe the damage and control measures of the following field pests. [10 Marks]

(a) Maize stem borer
(b) Mango weevil

4. Briefly describe a parasitoid, giving named examples. [5 Marks]

SECTION B

5. Discuss the following pesticides as used in pest management and describe their mode of
action. [20 Marks]

(a) Pyrethroid
(b) Organophosphate

6. Using a named example of a crop and pest, describe how you would develop an integrated pest management programme. Giving reasons for selecting the strategies named. [20 Marks]

7. (a) Discuss the impact of chemicals to the environment. [8 Marks]

(b) Discus botanical control as a pest management practice, giving examples.
[12 Marks]

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