A kind of portable photosensitive spraying system, including DC power supply, ambient light sensor, that assessment of electronic circuit judge whether the presence of " dusk " or " dawn " striation part from the received electric signal of optical sensor The container of the treatment fluid of expectation concentration Motor activates the condition appropriate as by sensing with that is pumped At least one will distribute the nozzle of the mist containing treatment fluid whenever pump operation With a timer, which closes pump later to terminate coating cycles. During the preferred application of system of the invention is, significant insect activity dusk and dawn that the cycle of the weak solution of spraying insecticide or pest repellant usually occurs. A kind of RF receiving units also disclose optionally activation and use transmitter.
