| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem wherein although mosquito larvae at a short distance can be killed, the mosquito larvae at a long distance cannot be killed by an ultrasound-radiating device. SOLUTION: The ultrasonic device 7 for controlling the mosquito larvae is constituted by attaching an ultrasound-generating device 2 including an ultrasonic oscillator sealed therein to a back-supporting member 1, mounting a terminal 3 and a switch 4 on the ultrasound-generating device 2, and supporting an ultrasound-reflecting member 6 with four supporting members 5 at the position facing to the ultrasound-generating device 2 at a prescribed interval. When the ultrasonic device 7 for controlling the mosquito larvae is inserted from shore to a river or a pond by being carried with a hand, a gripping part 8 to be supported by the hand is attached to the back-supporting member 1, and a power source 10 is connected to the terminal 3 of the ultrasound-generating device 2 of the ultrasonic device 7 for controlling the mosquito larvae through an oscillator 9. COPYRIGHT: (C)2007,JPO&INPIT
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