Do not spray directly over face. Avoid breathing DEET aerosol sprays. Wash treated skin and clothing after returning indoors. There are many Insects that look like mosquitoes. Some mosquitoes do not feed on humans or transmit diseases.
Different species have different larval habitats.
Adulticide and larvicide applications should not be automatic. Establish treatment thresholds and make applications only after counts of adults or larvae exceed these thresholds. To count larvae, collect them in white dippers in which they can be easily seen. Adults can be monitored with special light traps. Apply only to areas where mosquitoes are present.