Please select the most similar patent number from A, B, C and D. Which number is?
Provided by the present invention are a novel mosquito sex pheromone and an application thereof in mosquito control. The novel pheromone of the present invention is separated from mosquitoes, and has the functions of promoting male mosquito mating competitiveness, reproductive competition ability, or ability to attract female mosquitoes. The sex pheromone can provide a new, effective way of controlling mosquito population by means of regulating and controlling the mating competitiveness and reproductive ability of male mosquitoes (especially male sterile mosquitoes or genetically modified mosquitoes).
A: A wearable outdoor mosquito repelling apparatus (100) comprises an apparatus body (2) and a mosquito repelling device (1) fixed to the apparatus body by means of a rotary shaft (3). The mosquito repelling device comprises a microcontroller (10), an ultrasonic sensor (11), a steering motor (12), a laser transmitter (13), a speaker (15), and a blower (14). The ultrasonic sensor (11) is fixed to an upper portion of the mosquito repelling device (1). The laser transmitter (13) and the blower (14) are respectively fixed to outer sides of the mosquito repelling device (1). The ultrasonic sensor (11) detects an acoustic signal generated by a mosquito. Upon reception of the acoustic signal, the microcontroller (10) activates the steering motor to drive rotation of the rotary shaft (3), such that the laser transmitter (13) and the blower (14) synchronously rotate. The laser transmitter (13) emits a laser beam to kill the mosquito with electricity. The blower (14) generates and ejects an impinging airstream to repel the mosquito. The speaker (15) plays path guiding information indicating a path for an outdoor user to avoid the mosquito. The apparatus can effectively repel outdoor mosquitoes, thereby protecting an outdoor user from being stung and harmed by mosquitoes.
B: Provided is a mosquito killing device; said mosquito-killing device comprises a housing (1); said housing (1) is internally provided with a fan (11); the housing (1) is provided with a mosquito-attracting lamp (12) and an accommodating cover (2); said mosquito-attracting lamp (12) is fitted to the fan (11) and runs simultaneously with it; the accommodating cover (2) is provided with ventilation holes (21) and an accommodating compartment (22); the arrangement of the accommodating cover (2) allows it to collect mosquitoes very well, ensuring the user&#39;s indoor cleanliness and hygiene while also being such that the usage of the mosquito-killing device is very safe and environmentally friendly; the bodies of mosquitoes are stored in the accommodating compartment (22) so that it is unnecessary for the user to frequently clean the mosquito-killing device, greatly reducing the workload of the user and making the mosquito-killing device more convenient.
C: Disclosed is a mosquito-killing lamp (100) used for illuminating and killing mosquitoes, the lamp comprising at least one LED chip (80), an insect storage compartment (70), a negative pressure fan (60), a fan suspension bracket (40), a ventilation grid (50), and a power supply, and being characterised in that the insect storage compartment (70) is connected to the fan suspension bracket (40), the LED chip (80) is fixed on a lower end face of the insect storage compartment (70), the insect storage compartment (70) comprises an air inlet hole and an insect storage groove, the negative pressure fan (60) is fixed on the fan suspension bracket (40) and above the insect storage compartment (70), a gap (65) capable of allowing mosquitoes to pass through is reserved between vanes of the negative pressure fan (60) and an upper end face of the insect storage compartment (70), a plurality of ventilation holes (510) are provided on the ventilation grid (50), the size of the ventilation holes (510) can prevent mosquitoes from passing through the ventilation holes (510), the ventilation grid (50) is circumferentially provided between an outside wall of the fan suspension bracket (40) and an outside wall of the insect storage compartment (70), and the fan suspension bracket (40), the ventilation grid (50) and the insect storage compartment (70) form a space which is enclosed apart from the ventilation holes (510) and an air inlet hole (730).
D: A natural enemy ladybug attractant for controlling aphids, comprising a ladybug sex pheromone, a synomone, and a kairomone; the synomone is a phytovolatilization substance for luring aphids; the kairomone consists of an aphid alarm pheromone, aphid extract, and an aphid honeydew volatilization substance. The present ladybug attractant exhibits excellent luring effects whether in the laboratory or during field tests, and the repeatability and stability of said effects are high. Further, the invention applies to seven-spotted ladybugs, Asian lady beetles, propylea japonica, and other such beneficial ladybugs.
Answer: D