Applied Entomology — DU B.Sc. (Hons.) Zoology Previous Year Question Papers

4. (a) Define the biological method of insect pest control and justify its advantages over chemical control. Discuss the roles of parasitoids, predators, and pathogens with examples. (9) (b) Explain the difference between ETL and EIL. How are these two levels used in decision-making for pest control? 5. (a) Discuss the concept, objectives, and importance of Integrated Pest Management (IPM) in agriculture. Prepare a detailed IPM strategy for (b) Give an account of the damage caused to sugarcane' crop due to Scirpophaga nivella. (3) 6. (a) Describe identification, habitat, and feeding habits of major mosquito genera (Anopheles, Aedes, and Culex). Elaborate on biological, chemical, cultural, and physical methods for sustainable mosquito control. (10) (b) Give a brief account of the different mechanisms of insect resistance in plants with examples. (5) 7. Write short notes on any three of the following: (a) Role of insect hormones in pest control. (b) Co-evolution of insects and plants. (c) Insects of stored products - damage and prevention. (d) Sterile Insect Technique (SIT). 2. Attempt Five questions in all. 4. Draw well labelled diagrams wherever required. 1. (a) Define any five of the following: (5x1=5) (i) Biopesticide (ii) Larvae (ili) Apiculture (iv) Ootheca (V) Juvenile Hormone Analogues (b) Differentiate between the following : (Any five) (5x2=10) (i) Metamorphosis and Moulting (ii) Monophagous pest and Polyphagous pest (iii) Chemical control and Biological control (iv) Predators and Pdrasitoids (v) Vectors and reservoirs (vi) Genetic control and Microbial control (c) Write the damage causing stage and scientific n.ame of the following pests : (Any four) (e) Match the following : (8xO.5=4) (i) Honey bee a. Light traps (ii) Hemiptera b. Aluminium phosphide (iv) Grubs d. Wax (v) Fumigation e. Crop rotation (vi) Physical control f. Termite (vii) Cultural.control 9. Adult emergence (viii) Eclosion h. Coleoptera (i) Gram pod borer (ii) Pulse beetle (iii) Citrus / Lemon butterfly (iv) Red pumpkin beetle (v) Spotted bollworm ('d) Name the insect vector responsible for transmitting each of the following diseases : (3X1=3) 2. Describe the identification, life cycle, nature of damage, and control of the following : (7.5,7..5) 3. (a) Name any two beneficial insects and explain their biology along with their economic significance. (b)Discuss the role of insects in criminal investig\ations. Name two major groups of insects/ arthropods commonly associated with forensic studies. (6).