Which of the following species produces a single brood per season?

The species that produces a single brood per season is Coquillettidia perturbans. This mosquito is known for its specific reproductive behavior, which contrasts with many other mosquito species that can have multiple broods during a season.

Coquillettidia perturbans typically exhibits a life cycle that allows for the production of one batch of eggs per year, which is important for its survival strategy in specific environmental conditions. This trait can be tied to the habitats and climates where this species thrives, as it tends to develop in areas where conditions for breeding are less frequent or more challenging, leading to a more limited reproductive output.

In contrast, the other species listed are known for their capacity to reproduce multiple times in a given season. Culex pipiens, for example, is capable of producing multiple broods and is more common in urban settings during warm months. Aedes aegypti is well-known for its rapid reproduction, allowing it to take advantage of frequent water sources for breeding, while Ochlerotatus sticticus also tends to produce multiple broods during favorable conditions in wetland areas. Understanding these reproductive patterns is crucial for effective mosquito control management strategies in Minnesota and other regions.