and four layered by applying a rough pressure. A protection was made around the cage in order to protect human from electricity shocks in the state of the art, whereas the main function of the protection cage of our invention is to protect multiple cage system by which electricity current is conducted from impacts and consequently from short circuits, wherein its secondary function is protecting the human. While the electricity supplied to the cage system in order to kill the insects is supplied by continuous current in the state of the art, whereas the current in our invention does not cause permanent damage and does not carry the risk of death even if it shocks human body since the current is supplied discontinuously by the charge-discharge method. Another advantage of the subject matter catcher device is that it comprises a cover system configured in order that the light source placed right into the middle of the cage can be readily replaced by the user. While various light sources are tested in this cover system of the catcher device, surprisingly it is recognized that different kind of insects are attracted by different colored lights. For example, while the ultraviolet (UV) light source is used to catch tomato leaf miner (Tuta absoluta) adults, whereas it is determined that blue LED is more effective for some fly species and glow filament yellow light is more effective for other species in catching fungus gnats in cultivated mushroom production facilities. One of the advantages of the subject matter catcher device is that in the circuit of the device, a photocell relay is used when it is operated on open areas and a timer is used when it is operated in greenhouses in order to prevent the device from being active during the daytime, since useful flying insects are active only during the daytime. Hence, it is ensured that the killing feature of the device by electrical voltage is kept turned off during daylight hours. However, targeted pests can be caught also during daytime by only controlling the light source via photocell relay when the daytime pests which are not attracted by light but attracted by smell. At the same time, the catcher device both protects the useful insects and also contributes to increase their population as it minimizes the use of toxic chemical pesticides. Another advantage of the subject matter catcher device is that it contains an area in which articles such as smell, food, pheromone and the like attracting flies and insects can be placed within the bottom cover among the covers holding wire cage around the light source, and wherein, when the light source is off, it makes it possible to attract flies and insects into the trap.