![]() ![]() The effects of intermittent lighting and its potential use are discussed. However, in treatment 3, with one trap illuminated at a time and hourly illumination events, the mean fly catch was just 27% less, numerically, than the mean number of flies attracted to treatment 1 with both traps illuminated constantly. The mean number of flies attracted per trap pair was significantly greater in treatment 1 than in treatments 2 or 3. As it turned off, the other trap turned on for 1 h, then turned off, then repeated (1 illumination event every hour). One trap was turned on for 1 h, then turned off. Traps in treatment 3 were operated singularly. Both traps in treatment 2 were turned on, illuminated for 1 h, then turned off for 1 h, then repeated (1 illumination event every 2 h). Both traps in treatment 1 were illuminated constantly (no illumination event). Far fewer insects will show up because the yellow coating filters out the blue spectrum light which attracts many flying insects.Pairs of electrocutor-grid ultraviolet light traps were assigned to three treatments to evaluate the effects of illumination events, e.g., light traps turned on, on house fly, Musca domestica L., attraction as indicated by numbers of flies captured by the traps. Yellow bug lights can be used to illuminate patios and decks. While bug zappers are not an entirely effective means of controlling harmful biting insects, another option is to keep the bugs away altogether. This mist can become contaminated with germs that feed off of the dead insect parts, which may then be inhaled or settle on humans or other animals. Electrocuted bugs will turn into a mist that may contain parts of dead insects for up to 7 feet from the zapper. ![]() One final consideration is to keep zappers well away from any areas where humans will congregate for longer periods of time, or any food preparation areas. However, there are now bug zappers that emit both UV light as well as carbon dioxide. Mosquitoes in particular are attracted to carbon dioxide (in your breath) and water vapor (in your sweat) rather than ultraviolet light from zappers. In fact, they may even kill a larger number of beneficial insects than harmful ones. Traditional bug zappers will kill a large number of harmless insects. Unfortunately, many biting bugs are not attracted to the UV light coming from bug zappers, mosquitoes and biting gnats included. ![]() However, a better question to ask is whether zappers are effective at killing the most annoying bugs. Just ask anyone who has spent time around a zapper at night, as each insect that is killed can make the signature ZAP noise. The circuit closing is what causes the "ZAP" sound from the instrument. The bug itself completes the electric circuit, and the voltage crosses the space between the circuits, instantly vaporizing the bug. When the insect sees the UV light from the bug zapper bulb, it enters the space in between the mesh grids. Why are bugs more attracted to ultraviolet light? Interestingly, the flower patterns that insects are attracted to are revealed in UV light! Most Zappers use fluorescent light bulbs that emit ultraviolet light to attract the insects. The light bulb and the wires are housed in a protective plastic or grounded metal cage. An ultraviolet emitting light bulb attracts insects into a high voltage electrical wire mesh grid where the bugs are electrocuted. How Bug Zappers Workīug zappers, despite many improvements in safety and insect luring potential, are basically the same as they were when first invented. Rain and thunderstorms, birds that are finally coming back after a long winter, and ZAP! That's right, it's time to talk about bug zappers, an invention that has come a long way since it was first patented in 1934. ![]()
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