According to the China Disease Control WeChat official account, spring thunder is sprouting, the temperature is warming, and nature wakes up from deep sleep. At the same time, the mosquitoes and insects that had been lurking throughout the winter have quietly resumed work. Spring has arrived, how do mosquitoes "resurrect" and reappear around us? The mystery of the "smoke column" in early spring: Chironomatodes disturb people but do not bite them. In early spring, by the lake or riverbank, you may see a dark patch of "mosquitoes" parked on rocks, tree trunks, and even remaining snow. Under the city street lights, sometimes there are flying mosquitoes and insects, which look like a wisp of light smoke from afar and often make people feel uneasy. Don't panic! This is not an early attack by a large army of vampire mosquitoes, but a "collective mating event" of chironomid mosquitoes after their early spring eclosion - the phenomenon of them flying in groups, which is biologically called "mating flight". Identity card: Chironomid mosquitoes, belonging to the family Chironomidae in the order Diptera, are considered distant relatives of the blood sucking Culex and Aedes mosquitoes. Its biggest feature is that the mouthparts have completely degenerated, making it impossible to pierce the skin, so it does not pose a biting threat to humans and animals. Ecological role: Chironomid larvae (commonly known as "red worms") are the "cleaners" in the water and a delicious delicacy for fish; Adults are the "snacks" of birds and bats. It plays an important role in the aquatic ecological chain. Why attract attention: Although they don't bite people, the large number of chironomids like to gather together and easily fly into their eyes, ears, or contaminate food. So, distinguishing between chironomid mosquitoes and blood sucking mosquitoes is the first step in scientific mosquito control. Spring thunder awakens the "hibernator": different "scripts" for mosquito awakening. True blood sucking mosquitoes have different awakening times depending on their overwintering methods. Understanding their 'awakening script' helps us seize the opportunity for prevention and control. Act 1: Immediate "lurkers" overwintering mosquitoes. Protagonist: Culex pipiens pallens or Culex fatigans (commonly known as "house mosquitoes"). Awakening conditions: The temperature remains stable above 15 ° C. Hiding place: They hide right next to you - underground garages, corridors, pipeline wells, warm corners of residents' homes. Behavior: From a semi sleep state, "power on and restart", urgently needing to suck blood to start reproduction. Therefore, the "first bite" that is stung indoors in early spring or even in winter is almost always from them. They are the earliest "surprise attack masters" to be guarded against after the Awakening of Insects. Act 2: The most concealed "time bomb" - egg overwintering protagonist: Aedes albopictus (commonly known as "flower mosquitoes"). Awakening mechanism: Their eggs overwinter in a diapause state, with strong cold and drought resistance, and adhere to the inner wall of small water containers. There is no need for adult insects to awaken, as long as they encounter stagnant water, the eggs can be "activated" and gradually hatch. Behavior: In spring, the sunshine becomes longer, and the accumulated water formed by the first rainfall is their "hatching command". Therefore, cleaning up stagnant water containers during winter and spring seasons, and inspecting them again after spring rain, is the most critical measure to curb the summer outbreak of "flower mosquitoes". Of course, in warm southern regions, mosquitoes and insects have better overwintering conditions. Adults, larvae, and eggs may exist in suitable small environments in different proportions, and their activities will adjust with temperature and resource changes. Aedes albopictus. This article involves a copyright gallery, please be careful when reprinting to avoid infringement. Scientific response: classified measures should be taken to actively prevent "awakening scripts" for different mosquitoes, and corresponding "mosquito prevention strategies" should also be developed. In early spring, the focus should be on preventing and controlling indoor awakenings. Cleaning up the overwintering mosquito environment: inspecting and cleaning the corners of basements, corridors, and balconies to reduce the hiding places of adult mosquitoes. Physical barrier: Installing screen windows and using mosquito nets are the first choice for safe and effective mosquito prevention. Chemical assistance: When necessary, mosquito coils or electric mosquito coils can be used indoors to strive for "no mosquitoes indoors". Removing mosquito eggs and larvae at the source is the "fundamental solution". Pouring pots and cans: take immediate action to thoroughly remove all kinds of water containers in front and behind the house, balconies and rooftops, such as flower trays, waste tires, plastic films, etc. This is the most effective and environmentally friendly way to deal with "flower mosquitoes". Manage water bodies: dredge ditches and prevent water accumulation. Fish can be raised or safe microbial preparations can be used for viewing water bodies. Scientific understanding: When encountering a group of mosquitoes that do not bite, there is no need to panic and spray insecticides. They can close doors and windows, reduce light attraction, and their peak emergence usually lasts only a few days. (New Society)