Requirements for disease transmission by mosquitoes:
(1) sufficient moisture for life cycle
(2) temperature within required range for mosquitoes to survive (mosquitoes disappear if the temperature is below 5°C or above 40°C (page 92, Snow and Gilles).
(3) temperature requirements for pathogen development (for example, malaria requires sporogony)
Control measures should match the need:
(1) Widespread control measures are labor intensive and expensive.
(2) Control measures may involve release of a large amount of toxic chemicals into the environment.
Factors resulting in a seasonality to mosquito activity
(1) A dry season significantly reduces mosquito development.
(2) Cold weather significantly reduces mosquito development and activity.
Exceptions to decreased transmission during a dry season:
(1) widespread use of irrigation
(2) rice farming
(3) urban setting where small habitats abound
(4) presence of swamps or other suitable bodies of water
