In recent years, the use of black light lamps in fisheries has increased, which not only can provide animal feed for fish, save commercial feed, reduce the cost of fish farming, and increase the benefits for farmers; The harm of pests to crops, so the installation of black light in the fish pond can play the role of “two birds with one stoneâ€. The following describes the installation and use of black light:
The black light is a special kind of light. The ultraviolet light emitted by the light is harmless to people and fish, but the brightness is small and the illumination is low. Therefore, the light of this light is called "black light". The test proves that many insects (large Some are agricultural pests. They are most sensitive to ultraviolet light with a wavelength of 3000 to 4000 angstroms, and have the highest phototaxis. The black light has an emission wavelength of about 3600 angstroms, which is an ideal light source for attracting insects.
There are many kinds of insects attracted by black light, including major pests such as grain, cotton, oil and fruit, such as corn borer, cotton bollworm, cockroach, armyworm, chafer, red locust, ground tiger, and heartworm.
If a black light is installed in the aquarium and a collision facility is placed on the lamp, the insect can be allowed to fall into the aquarium. This can provide feed for the pond fish, kill crop pests, and receive fish. The dual effect of pest control.
First, equipment: Black light consists of AC power, black light tube and accessories, rain cover, insect shield, light stand and other parts. The shape and structure of the black light tube is the same as that of the ordinary fluorescent tube, except that the phosphor coated on the inner wall of the tube is different. Currently used black light booking tubes are available in 20 watts and 40 watts. Black light accessories include rectifiers, relays, and switches. The specifications of the accessories should be the same as those of the black light tube. The rain cover is a device that prevents the black light tube and its accessories from entering the water. It should be placed above the lamp and its accessories. The insect block can be made of hard and transparent things such as glass plates, and its length is the same as the length of the lamp tube. Each lamp tube can be used with 3-4 pieces of the insect shield. The lamp holder can be made of wooden poles, bamboo poles and iron tripods.
Second, the principle of installing and installing black light is safe, economical, simple and effective. Black light can be placed in the center of the pool. If the water surface is large, several fish can be set in the place where the fish are concentrated, or where the fish are concentrated, or in the frequently active area. The height of the black light should be appropriate, not too high from the water surface to avoid affecting the insect attracting effect; nor should it be too low to prevent the lamp from being damaged when the fish prey. It is also possible to increase the efficiency of attracting insects by adding a common electric lamp to the black light. After experimentation, add a normal 60 watt bulb to a black light. The efficiency of attracting insects can be increased by 0.7 to 3.2 times.
Third, the use of black light precautions. The trapping effect of black light is related to climatic conditions. In the absence of rain, no wind [or breeze), the amount of trapping is high; in heavy rain or strong wind, the amount of trapping is small. and so. Whether or not to turn on the light should be made depending on the weather. under normal circumstances. The activities of various insects at night are not the same. Therefore, places where conditions permit should be turned on all night.
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