A portable fluid mist sprayer system comprising: an electrical power source; at least one spray nozzle configured to discharge a treating fluid in the form of a mist; an ambient light sensor; an electronic control unit that initiates a flow of pressurized treating fluid to the at least one spray nozzle in response to sensed ambient light of predetermined intensity and duration that occur at dusk and dawn; and wherein the electronic control unit comprises a light level discrimination module and a power supply module; characterized in that the portable fluid mist sprayer system further comprises a warning system including an LED and/or a buzzer, wherein the warning system is configured to provide a warning prior to a discharge of the treating fluid, the portable fluid mist sprayer system further being configured to be used with an aerosol container containing the treating fluid and having an internal valve and a valve stem, the system further comprising: a housing configured to receive the aerosol container; a tubing secured to a channel, wherein the valve stem is located in an opening of the channel when the aerosol container is received in the housing, and wherein the tubing provides fluid communication between the aerosol container and the at least one spray nozzle; a motor adapted to selectively actuate the aerosol container valve; and wherein the electronic control unit activates the motor to initiate the flow of pressurized treating fluid; and wherein the electronic control unit further comprises a motor controller module. an electrical power source; at least one spray nozzle configured to discharge a treating fluid in the form of a mist; an ambient light sensor; an electronic control unit that initiates a flow of pressurized treating fluid to the at least one spray nozzle in response to sensed ambient light of predetermined intensity and duration that occur at dusk and dawn; and wherein the electronic control unit comprises a light level discrimination module and a power supply module; characterized in that the portable fluid mist sprayer system further comprises a warning system including an LED and/or a buzzer, wherein the warning system is configured to provide a warning prior to a discharge of the treating fluid, the portable fluid mist sprayer system further being configured to be used with an aerosol container containing the treating fluid and having an internal valve and a valve stem, the system further comprising: a housing configured to receive the aerosol container; a tubing secured to a channel, wherein the valve stem is located in an opening of the channel when the aerosol container is received in the housing, and wherein the tubing provides fluid communication between the aerosol container and the at least one spray nozzle; a motor adapted to selectively actuate the aerosol container valve; and wherein the electronic control unit activates the motor to initiate the flow of pressurized treating fluid; and wherein the electronic control unit further comprises a motor controller module. a housing configured to receive the aerosol container; a tubing secured to a channel, wherein the valve stem is located in an opening of the channel when the aerosol container is received in the housing, and wherein the tubing provides fluid communication between the aerosol container and the at least one spray nozzle; a motor adapted to selectively actuate the aerosol container valve; and wherein the electronic control unit activates the motor to initiate the flow of pressurized treating fluid; and wherein the electronic control unit further comprises a motor controller module.