What is a Gravid trap?

What is a Gravid trap?

• A. A device that lures adult female mosquitoes of mostly Culex species that have taken a blood meal and are looking for a place to deposit eggs.
• B. A net used to catch adult mosquitoes during the day.
• C. A trap used to capture male mosquitoes only.
• D. A misting device for reducing mosquito populations.

Answer: (A)

A gravid trap is designed to target female mosquitoes that have already taken a blood meal and are actively seeking a place to lay eggs. These gravid females, especially Culex species, are attracted to standing water with infusions that mimic a suitable oviposition site, where the trap then captures them. This makes the trap a focused tool for surveillance and reducing reproduction by catching the mosquitoes most ready to lay eggs. The other options don’t fit this behavior. A net used during the day targets general, host-seeking adults rather than those looking to oviposit. A trap for male mosquitoes only misses the females that actually contribute to the next generation. A misting device aims to reduce overall mosquito numbers with insecticide rather than exploiting oviposition behavior.

A gravid trap is designed to target female mosquitoes that have already taken a blood meal and are actively seeking a place to lay eggs. These gravid females, especially Culex species, are attracted to standing water with infusions that mimic a suitable oviposition site, where the trap then captures them. This makes the trap a focused tool for surveillance and reducing reproduction by catching the mosquitoes most ready to lay eggs.

The other options don’t fit this behavior. A net used during the day targets general, host-seeking adults rather than those looking to oviposit. A trap for male mosquitoes only misses the females that actually contribute to the next generation. A misting device aims to reduce overall mosquito numbers with insecticide rather than exploiting oviposition behavior.