Mosquitoes

Question 1

Life cycle of the mosquito

Answer 1

Need water to lay eggs.
Eggs hatch, and all larvae are aquatic. and breath air through a siphon tube
Larva freely move around “wigglers”
Pupate in the water- Pupa look like shrimp
adult emerges from pupa at water surface

Question 2

Culex spp

Answer 2

eggs laid in rafts on the water. they hatch as a function of temperature

Transmission of West Nile Virus

Question 3

Aedes spp and Ochlerotatus sp.

Answer 3

individual eggs laid in small depressions on dry ground. Eggs hatch only after proper stimulus (H20)
- Larvae of both feed at an angle to the surface of the water and adult females of these genera have short palps

Question 4

Anopheles sp.

Answer 4

Eggs laid individually, bubble of air trapped by the frill keeps the egg floating. Larvae feed parallel to surface of water.

Question 5

Mosquitoes role in EEE

Answer 5

Eastern Equine Encephalitis: they serve as bridge vectors. feed on birds acquiring virus and then feed on dead end hosts (horse or humans)

Question 6

How to control for EEE

Answer 6

Spraying adulticide; insect growth regulators
repellents and mechanical protection
Environmental controls: draining or filling breeding grounds