When are these Aerial Salt Marsh Larviciding treatments conducted?

Two species of salt marsh mosquitoes lay their eggs in moist, muddy areas, such as depressions and stagnant ditches, along the upper edges of the salt marsh. High tides (lunar tides) flood these areas once a month, as well as storm or rain events, which trigger the hatching of mosquito eggs. They progress through aquatic stages and can emerge as adult mosquitoes in as little as four days in hot weather.