Psorophora ciliate, the largest blood feeding mosquito in Louisiana, will overwinter in which stage of development?

Psorophora ciliate, a significant mosquito species in Louisiana, overwinter primarily in the egg stage. This adaptation is crucial for its survival during colder months when environmental conditions are not suitable for active development. The eggs are capable of entering a state of dormancy, allowing them to withstand freezing temperatures and desiccation.

When conditions become favorable again in the spring, usually following rainfall which provides suitable habitats, the eggs hatch into larvae. This life cycle strategy enables Psorophora ciliate to quickly exploit available resources in the environment as the temperatures warm up.

The other stages—pupae, larvae, and adults—do not have the same ability to survive winter conditions. Pupae and larvae require water to develop, making them vulnerable during dry or cold seasons. Adult mosquitoes can also seek shelter but have a limited lifespan compared to the resilience of dormant eggs. Hence, overwintering in the egg stage is key to the species' survival and successful population rebound in the spring.