entomology MCQs – Page 13

Practise focused entomology questions with marked answers for exam preparation and subject revision.

entomology Mcqs
241. Those insects which lives in groups, clones or tribes form are called__________________?
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A. Household insects

B. Gregarious insects

C. Social insects

D. Solitary insects

242. The amount of pest induced injury to the crop which will justify the cost of artificial control measures is called________________?
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A. None of the Above

B. Economic damage

C. Economic injury level

D. Economic threshold

243. All the practices used to control the pest population with in certain limit are called_________________?
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A. Artificial control

B. Chemical control

C. Cultural control

D. Natural control

244. Jassid, Aphid and bugs have________________?
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A. Piecing sucking type

B. Siphoning type

C. Rasping

D. Sponging type

245. Hymenoptera are almost_______ long.
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A. 0.03 mm

B. 0.3 mm

C. 0.02 mm

D. 0.2 mm
246. The ability of a plant by means of which it is less damaged by insects is________________?
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A. Tolerance

B. Plant resistance

C. Resistance

D. Pest avoidance

247. The body of an insect is covered by a protective __________________ formed from chitin and protein. Depending upon its precise composition and thickness, the cuticle may be soft and flexible or hard and rigid; according to requirements, it may or may not be permeable or waterproof:
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A. Six- layered skin (cuticle)

B. None of the above

C. three-layered skin (cuticle)

D. Two-layered skin (cuticle)

248. What is function of deterrent__________________?
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A. Chemical which prevent feeding

B. None of the above

C. Prevent feeding and oviposition of an insect

D. Prevent ovipositon of an insect

249. What is the family of mosquito________________?
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A. Tineidae

B. Pyralidae

C. Bombicidae

D. Culicidae
250. The concentration of a toxicant that kills 50% of the exposed organism is called_________________?
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A. LC50

B. LD<sub>50</sub>

C. LD<sub>75</sub>

D. None of the Above

251. Cotesia flavipers is endo larval parasite of_________________?
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A. Sugarcane black borer

B. Sugarcane stem borer

C. Sugarcane root borer

D. Sugarcane top borer

252. A level of resistance show by a cultivar is similar against all insect biotype such type of resistance is__________________?
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A. General resistance

B. Cross resistance

C. Specific resistance

D. Vertical resistance

253. Example of inorganic pesticides are__________________?
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A. calcium cyanide, boric acid

B. Oxygen, sulfur

C. Phosphorus, chlorine

D. Chlorine, nitrogen

254. Cotton bollworms, sugarcane borers are_________________?
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A. Major pest

B. Minor pest

C. Key pest

D. Secondary pest

255. The parasites which requires several or different hosts for its complete development is called ?
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A. Heteroxenous parasites

B. Monoxenous parasite

C. Phytophagous parasites

D. Entomophagous parasites

256. Propagation and release of sterile incompatible individuals is done in pest population is called:____________?
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A. Genetic control

B. both A & B

C. Chemical control

D. None of these

257. The parasite which are capable of developing upon a few closely related host species is called_______________?
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A. Polyhagous parasites

B. Oligophagous parasites

C. Facultative parasites

D. Transitory parasites