NATIONAL OPEN UNIVERSITY OF NIGERIA1234
Plot 91, Cadastral Zone, Nnamdi Azikiwe Expressway, Jabi – Abuja
Faculty of Health Sciences
Department of Environmental Health Sciences
2020_2 EXAMINATION
Course Code: EHS 305
Course Title: General Entomology
Course Units: 2 Credit Units
Time Allowed: 2 Hours
Total Score: 70 Marks
INSTRUCTION: Answer ALL the Questions
1a. Give an elaborate definition of entomology (3 marks)
1b List in detail the importance of insects in the modern day society. (7 marks)
1c Outline the Careers obtained in the study of entomology (6 marks)
1d Highlight four (4) enhanced Areas in the study of entomology (4marks)
2a Discuss in detail the process of insect collection, arrangement and care. (10 marks)
2b With the aid of an illustration, list and explain the common types of metamorphosis. (8 marks)
2c State the specific procedures peculiar to the spreading of Butterflies and Moths in the
laboratory. (4 marks)
2d Discuss any three (3) methods that can be adopted in controlling insects culturally. (3marks)
3a Outline the main merits of physical and mechanical insect control method. (5 marks)
3b Explain the methods involved in chemical control of insects on a farmland. (8 marks)
3c Discuss the principles behind the application of chemical sterilization methods in insects.
(7marks)
3d List Five (5) common Chemosterilants with their specific mode of action. (5 marks)
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