MINNESOTA PESTICIDE CATEGORY L: MOSQUITO CONTROL VERIFIED
EXAM SOLUTIONS - COMPREHENSIVE QUESTIONS AND ANSWERS -
CURRENT VERSION (2026/2027)
Q1. What type of metamorphosis do mosquitoes undergo?
A) Incomplete metamorphosis
B) Complete metamorphosis
C) Simple metamorphosis
D) Direct development
✓ Answer: B | Explanation: Mosquitoes undergo complete metamorphosis
(holometabolous), with four distinct stages: egg, larva, pupa, and adult.
Q2. Which mosquito life stage is aquatic?
A) Adult only
B) Egg, larva, and pupa
C) Larva only
D) Pupa and adult
✓ Answer: B | Explanation: The egg, larva, and pupal stages all occur in
water; only the adult is terrestrial.
Q3. How many larval instars do mosquitoes have?
A) Two
B) Three
C) Four
D) Five
✓ Answer: C | Explanation: Mosquito larvae pass through four instars before
pupating.
Q4. Which mosquito stage does NOT feed?
A) First instar larva
B) Adult female
C) Pupa
D) Fourth instar larva
✓ Answer: C | Explanation: The pupal stage is non-feeding; it is a transition
stage between larva and adult.
Q5. Aedes mosquito eggs are most commonly deposited:
A) Directly on water surface in rafts
, B) Individually on moist soil or vegetation near water
C) On submerged aquatic plants
D) In tree holes only
✓ Answer: B | Explanation: Aedes species typically lay eggs singly on moist
substrates that will later flood, allowing eggs to survive desiccation.
Q6. Culex mosquitoes typically lay their eggs:
A) Individually on moist soil
B) In egg rafts on the water surface
C) On submerged vegetation
D) In tree holes only
✓ Answer: B | Explanation: Culex females lay eggs in floating rafts of 100–
300+ eggs on standing water.
Q7. Which mosquito genus is a primary vector of West Nile virus in
Minnesota?
A) Aedes
B) Anopheles
C) Culex
D) Mansonia
✓ Answer: C | Explanation: Culex tarsalis and Culex pipiens complex
mosquitoes are the primary vectors of West Nile virus in Minnesota.
Q8. La Crosse encephalitis is primarily transmitted by which mosquito?
A) Culex pipiens
B) Aedes triseriatus
C) Anopheles quadrimaculatus
D) Aedes aegypti
✓ Answer: B | Explanation: Aedes triseriatus (eastern treehole mosquito) is
the primary vector of La Crosse encephalitis virus.
Q9. What is the primary feeding behavior of male mosquitoes?
A) Blood feeding
B) Nectar and plant juice feeding
C) Feeding on other insects
D) They do not feed
✓ Answer: B | Explanation: Male mosquitoes do not blood-feed; they feed
on nectar and plant juices for energy.
Q10. Why do female mosquitoes require a blood meal?
A) For energy to fly
, B) For protein to develop eggs
C) For hydration
D) To survive winter
✓ Answer: B | Explanation: Female mosquitoes require blood proteins
(primarily from vertebrate hosts) to develop their eggs (vitellogenesis).
Q11. Which mosquito is the primary vector of malaria?
A) Culex pipiens
B) Aedes albopictus
C) Anopheles species
D) Psorophora species
✓ Answer: C | Explanation: Anopheles mosquitoes are the vectors of
Plasmodium parasites, which cause malaria.
Q12. The term 'gonotrophic cycle' refers to:
A) The seasonal activity of mosquitoes
B) The cycle from blood meal to egg laying
C) Overwintering behavior
D) Larval development stages
✓ Answer: B | Explanation: The gonotrophic cycle encompasses blood
feeding, egg development, and oviposition.
Q13. Mosquito larvae breathe through:
A) Gills
B) Their entire body surface
C) A siphon or breathing tube
D) Spiracles on the thorax
✓ Answer: C | Explanation: Most mosquito larvae breathe air through a
siphon (respiratory tube) at the end of the abdomen.
Q14. Which mosquito larval position is characteristic of Anopheles
species?
A) Hanging vertically at a 45-degree angle
B) Lying parallel to the water surface
C) Resting at the bottom
D) Hanging straight down
✓ Answer: B | Explanation: Anopheles larvae rest horizontally at the water
surface, unlike Culex/Aedes which hang at an angle.
Q15. What is the typical lifespan of an adult female mosquito?
A) 1–3 days
, B) 2–4 weeks
C) 3–6 months
D) 1 year
✓ Answer: B | Explanation: Adult female mosquitoes typically live 2–4 weeks
under field conditions, though this varies by species and environment.
Q16. Mosquito eggs of Aedes species can survive desiccation for:
A) A few hours
B) Up to 5 years or more
C) Exactly one winter
D) Only 30 days
✓ Answer: B | Explanation: Aedes eggs are drought-resistant and can
remain viable for years in dry conditions, hatching when flooded.
Q17. Which mosquito is known as the 'floodwater mosquito' in Minnesota?
A) Culex tarsalis
B) Aedes vexans
C) Anopheles punctipennis
D) Culiseta inornata
✓ Answer: B | Explanation: Aedes vexans is a common floodwater mosquito
in Minnesota, breeding in temporary floodwater pools.
Q18. The pupal stage of a mosquito is also called:
A) Nymph
B) Tumbler
C) Wriggler
D) Instar
✓ Answer: B | Explanation: Mosquito pupae are commonly called 'tumblers'
due to their tumbling swimming motion.
Q19. Mosquito larvae are commonly called:
A) Tumblers
B) Wrigglers
C) Nymphs
D) Grubs
✓ Answer: B | Explanation: Mosquito larvae are commonly called 'wrigglers'
because of their characteristic wriggling movement in water.
Q20. Which factor most affects the rate of mosquito larval development?
A) Wind speed
B) Water temperature
EXAM SOLUTIONS - COMPREHENSIVE QUESTIONS AND ANSWERS -
CURRENT VERSION (2026/2027)
Q1. What type of metamorphosis do mosquitoes undergo?
A) Incomplete metamorphosis
B) Complete metamorphosis
C) Simple metamorphosis
D) Direct development
✓ Answer: B | Explanation: Mosquitoes undergo complete metamorphosis
(holometabolous), with four distinct stages: egg, larva, pupa, and adult.
Q2. Which mosquito life stage is aquatic?
A) Adult only
B) Egg, larva, and pupa
C) Larva only
D) Pupa and adult
✓ Answer: B | Explanation: The egg, larva, and pupal stages all occur in
water; only the adult is terrestrial.
Q3. How many larval instars do mosquitoes have?
A) Two
B) Three
C) Four
D) Five
✓ Answer: C | Explanation: Mosquito larvae pass through four instars before
pupating.
Q4. Which mosquito stage does NOT feed?
A) First instar larva
B) Adult female
C) Pupa
D) Fourth instar larva
✓ Answer: C | Explanation: The pupal stage is non-feeding; it is a transition
stage between larva and adult.
Q5. Aedes mosquito eggs are most commonly deposited:
A) Directly on water surface in rafts
, B) Individually on moist soil or vegetation near water
C) On submerged aquatic plants
D) In tree holes only
✓ Answer: B | Explanation: Aedes species typically lay eggs singly on moist
substrates that will later flood, allowing eggs to survive desiccation.
Q6. Culex mosquitoes typically lay their eggs:
A) Individually on moist soil
B) In egg rafts on the water surface
C) On submerged vegetation
D) In tree holes only
✓ Answer: B | Explanation: Culex females lay eggs in floating rafts of 100–
300+ eggs on standing water.
Q7. Which mosquito genus is a primary vector of West Nile virus in
Minnesota?
A) Aedes
B) Anopheles
C) Culex
D) Mansonia
✓ Answer: C | Explanation: Culex tarsalis and Culex pipiens complex
mosquitoes are the primary vectors of West Nile virus in Minnesota.
Q8. La Crosse encephalitis is primarily transmitted by which mosquito?
A) Culex pipiens
B) Aedes triseriatus
C) Anopheles quadrimaculatus
D) Aedes aegypti
✓ Answer: B | Explanation: Aedes triseriatus (eastern treehole mosquito) is
the primary vector of La Crosse encephalitis virus.
Q9. What is the primary feeding behavior of male mosquitoes?
A) Blood feeding
B) Nectar and plant juice feeding
C) Feeding on other insects
D) They do not feed
✓ Answer: B | Explanation: Male mosquitoes do not blood-feed; they feed
on nectar and plant juices for energy.
Q10. Why do female mosquitoes require a blood meal?
A) For energy to fly
, B) For protein to develop eggs
C) For hydration
D) To survive winter
✓ Answer: B | Explanation: Female mosquitoes require blood proteins
(primarily from vertebrate hosts) to develop their eggs (vitellogenesis).
Q11. Which mosquito is the primary vector of malaria?
A) Culex pipiens
B) Aedes albopictus
C) Anopheles species
D) Psorophora species
✓ Answer: C | Explanation: Anopheles mosquitoes are the vectors of
Plasmodium parasites, which cause malaria.
Q12. The term 'gonotrophic cycle' refers to:
A) The seasonal activity of mosquitoes
B) The cycle from blood meal to egg laying
C) Overwintering behavior
D) Larval development stages
✓ Answer: B | Explanation: The gonotrophic cycle encompasses blood
feeding, egg development, and oviposition.
Q13. Mosquito larvae breathe through:
A) Gills
B) Their entire body surface
C) A siphon or breathing tube
D) Spiracles on the thorax
✓ Answer: C | Explanation: Most mosquito larvae breathe air through a
siphon (respiratory tube) at the end of the abdomen.
Q14. Which mosquito larval position is characteristic of Anopheles
species?
A) Hanging vertically at a 45-degree angle
B) Lying parallel to the water surface
C) Resting at the bottom
D) Hanging straight down
✓ Answer: B | Explanation: Anopheles larvae rest horizontally at the water
surface, unlike Culex/Aedes which hang at an angle.
Q15. What is the typical lifespan of an adult female mosquito?
A) 1–3 days
, B) 2–4 weeks
C) 3–6 months
D) 1 year
✓ Answer: B | Explanation: Adult female mosquitoes typically live 2–4 weeks
under field conditions, though this varies by species and environment.
Q16. Mosquito eggs of Aedes species can survive desiccation for:
A) A few hours
B) Up to 5 years or more
C) Exactly one winter
D) Only 30 days
✓ Answer: B | Explanation: Aedes eggs are drought-resistant and can
remain viable for years in dry conditions, hatching when flooded.
Q17. Which mosquito is known as the 'floodwater mosquito' in Minnesota?
A) Culex tarsalis
B) Aedes vexans
C) Anopheles punctipennis
D) Culiseta inornata
✓ Answer: B | Explanation: Aedes vexans is a common floodwater mosquito
in Minnesota, breeding in temporary floodwater pools.
Q18. The pupal stage of a mosquito is also called:
A) Nymph
B) Tumbler
C) Wriggler
D) Instar
✓ Answer: B | Explanation: Mosquito pupae are commonly called 'tumblers'
due to their tumbling swimming motion.
Q19. Mosquito larvae are commonly called:
A) Tumblers
B) Wrigglers
C) Nymphs
D) Grubs
✓ Answer: B | Explanation: Mosquito larvae are commonly called 'wrigglers'
because of their characteristic wriggling movement in water.
Q20. Which factor most affects the rate of mosquito larval development?
A) Wind speed
B) Water temperature
