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Sample questions
When distinguishing the yellow fever mosquito (*Aedes aegypti*) from the Asian tiger mosquito (*Aedes albopictus*) in the field, which characteristic is the deciding detail?
- The presence of white bands at the base of the hind leg segments
- A single straight white stripe running down the center of the thorax
- A set of pale lyre- or violin-shaped scales on top of the thorax
- The mosquito's tendency to bite during the day
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The yellow fever mosquito wears the curved lyre pattern on its thorax; the tiger mosquito shows one straight white stripe down the center.🔗 Source
According to the provided text, what is the most effective first step for a homeowner to reduce mosquito populations before using chemical treatments?
- Applying adulticides near the home
- Using Bti dunks in all standing water
- Source reduction through eliminating standing water
- Repairing window and door screens
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Eliminating that water is the most effective, least chemical-heavy step, so a single biting mosquito with no larval source found calls for inspection and source reduction first, not blanket spraying.🔗 Source
In terms of seasonality and temperature, how does the yellow fever mosquito react to cold conditions?
- The mosquito ceases all biological activity immediately.
- Larvae can linger for months in cool conditions.
- The mosquito only breeds in cold, temperate waters.
- The life cycle accelerates to ensure survival.
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Cold slows it sharply: in cool conditions larvae can linger for months, and the drought-hardy eggs wait out dry spells, hatching when warm standing water returns.🔗 Source
Which of the following is a recognized sign of a yellow fever mosquito presence?
- Bites occurring exclusively at dusk.
- Daytime feeding, especially around the ankles.
- Large swarms of mosquitoes flying above tree canopies.
- Larvae found only in large, permanent lakes.
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The first sign is usually the bite itself: daytime feeding, especially around the ankles, points to this mosquito rather than dusk-biting species.🔗 Source
When implementing a control program, how should adulticides be utilized according to the text?
- As a primary replacement for larval source reduction.
- As a blanket spray for the entire property.
- As a targeted supplement near homes, not a substitute for source reduction.
- Only when eggs are found in bromeliads.
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Reserve contact adulticides for targeted harborage near homes as a supplement, not a replacement, and pair every treatment with screen repair, repellent guidance, and container removal.🔗 Source
Which larvicide is recommended for treating water where removal is not possible?
- DEET
- Picaridin
- Bacillus thuringiensis israelensis (Bti)
- Oil of lemon eucalyptus
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Where water cannot be removed, treat it with a Bacillus thuringiensis israelensis (Bti) larvicide, sold in homeowner formulations such as floating dunks; it targets mosquito larvae specifically and spares people, other animals, and plants.🔗 Source
Which statement best describes the flight range and habitat preference of the adult yellow fever mosquito?
- They travel long distances to find new breeding sites.
- They stay close to where they hatched, traveling only a few hundred yards.
- They are primarily found in deep forests away from human dwellings.
- They only inhabit permanent water bodies like lakes.
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Adults stay close to where they hatched, traveling only a few hundred yards.🔗 Source
Where is the most likely location to find mosquito eggs laid by the female *Aedes aegypti*?
- Submerged in the bottom of permanent ponds
- Just above the waterline on damp container walls
- In floating organic matter within standing water
- Deep within soil or leaf litter away from water
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Females lay roughly 100 to 200 eggs per batch and up to five batches in a lifetime, placing them just above the waterline on damp container walls so a later rise in water floods and hatches them.🔗 Source
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