What is the ventral tube on the first abdominal segment of a springtail called?
Correct answer B. Collophore
Topic / 244 questions
Entomology MCQs
Entomology MCQs are multiple-choice questions about the scientific study of insects, covering their body structure, life cycles, hormones, pest behaviour and pesticide use. They help agriculture and zoology students and Agriculture Officer or lecturer candidates revise this specialised subject, and every question shows the correct answer instantly so you can learn from each attempt.
What is the type of parthenogenesis called in which unfertilised eggs give rise to both male and female offspring?
Correct answer C. Amphitoky
What is the tail, including the tail-like structure of an aphid, called?
Correct answer B. Cauda
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What term describes the arrangement and number of bristles (setae) on the body and appendages, which is important in classifying Diptera and mites?
Correct answer A. Chaetotaxy
What are the external grooves that divide the insect body wall into areas called?
Correct answer C. Sutures
Which sex of the lac insect produces lac?
Correct answer B. More by females than males
Which of the following insects produces silk?
Correct answer B. Bombyx mori
Which crop is attacked by the Gurdaspur borer?
Correct answer C. Sugarcane
What type of mouthparts does the sugarcane pyrilla have?
Correct answer B. Sucking
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Applying all available control strategies to keep a pest population below the economic injury level is known as what?
Correct answer D. IPM
The insect head is a capsule that encloses the brain and bears the mouthparts, eyes and a pair of antennae. Which basic sections make up the mouthparts?
Correct answer D. All of these
An insect’s body is covered by a protective cuticle made of chitin and protein, which may be soft or rigid and permeable or waterproof depending on its make-up. What kind of covering is this cuticle?
Correct answer C. Three-layered skin (cuticle)
What does KD50 stand for?
Correct answer A. Median knockdown
Which insecticide is commonly combined with lures and pheromone traps to control fruit flies?
Correct answer A. Malathion
What is the width of the strip treated in a single pass of a sprayer or other applicator called?
Correct answer B. Swath
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What term describes a pesticide’s ability to remain as an effective residue because of its low volatility and chemical stability?
Correct answer B. Persistence
What is the concentration of a toxicant that kills 50% of the exposed organisms called?
Correct answer B. LC50
What does the term toxicant refer to?
Correct answer B. Poisonous material
What is the material used to dilute the active ingredient of a pesticide called?
Correct answer C. Carrier
What is a substance added to a pesticide to improve the qualities of its formulation called?
Correct answer C. Adjuvant
About Entomology MCQs
This category covers insect morphology, physiology and applied pest management. Questions ask about the three parts of an antenna, the halteres that replace hind wings in true flies, the sternum or ventral body region, and the pupa as the resting stage of insects with complete metamorphosis. Physiology items cover juvenile hormone, while applied questions deal with pest resurgence, solitary versus social insects, pesticide adjuvants, toxicity measures such as LD50 and the colour codes on pesticide labels.
Agricultural entomology is a core subject for plant protection and is tested in Agriculture Officer, Plant Protection Officer and agriculture lecturer recruitment. Questions are often technical, so you need accurate terms rather than general knowledge. Understanding insect biology also helps with integrated pest management questions, which combine knowledge of life cycles, natural enemies and safe chemical use to protect crops economically.
Key facts to remember
- An insect's body is divided into three parts: head, thorax and abdomen.
- Insect antennae consist of three main parts: scape, pedicel and flagellum.
- In true flies (Diptera) the hind wings are reduced to knobbed halteres used for balance.
- The pupa is the resting stage in insects with complete metamorphosis (Endopterygota).
- Juvenile hormone keeps insects in their immature form and prevents premature metamorphosis.
- LD50 is the dose of a toxicant that kills half of a test population.
Exams that include Entomology MCQs
Pakistan
- PPSC Agriculture Officer
- SPSC
- KPPSC
- FPSC
- Lecturer tests
India
- ICAR AIEEA
- UGC NET
- State PSC exams
- IBPS (Agriculture Field Officer)
Bangladesh
- BCS (Agriculture cadre)
- Government job tests
- University admission tests
How to prepare for Entomology MCQs
- Draw and label a generalised insect showing antenna parts, mouthparts, wings and body regions, as structure questions are very frequent.
- Learn the major insect orders with one crop pest example each, such as Lepidoptera for bollworms and Hemiptera for aphids.
- Revise pesticide toxicity terms like LD50 and the label colour bands, because these practical safety questions appear regularly.
- Compare complete and incomplete metamorphosis in a simple chart, noting larva, pupa and nymph stages.
Frequently asked questions
What is entomology?
Entomology is the scientific study of insects, including their structure, physiology, behaviour, classification and relationship with humans. Agricultural entomology focuses on insect pests of crops and stored grain, beneficial insects such as pollinators and natural enemies, and methods of pest control.
How many Entomology MCQs are on MCQs360?
MCQs360 offers 253 Entomology MCQs with instant answers. They are free to practise without sign-up, so you can work through insect anatomy, physiology and pest management questions at your own pace. Start with insect structure before moving to pest management.
Which exams ask Entomology MCQs?
Entomology is tested in Agriculture Officer and Plant Protection recruitment by PPSC, SPSC, KPPSC and FPSC, and in agriculture lecturer tests. It also appears in ICAR AIEEA, UGC NET and state agriculture exams in India, and in the BCS agriculture cadre in Bangladesh.
What is pest resurgence?
Pest resurgence is the rapid reappearance of a pest population in damaging numbers after it was suppressed, often following pesticide use. It usually happens because the pesticide also kills natural enemies, so the surviving or returning pests multiply without their usual checks.
Last reviewed October 2026