Why do mosquitoes appear in summer?

Summer is the most suitable environment for mosquitoes to survive. It is hot and humid here, with high temperature, abundant water, rapid bacterial reproduction and excessive sweating in summer, which attracts female mosquitoes to suck blood and multiply, resulting in more and more mosquitoes.

Mosquitoes like to lay their eggs in clean water, such as rivers, rain pools, ponds, swamps, rice fields and mountain streams. In warm seasons, eggs can hatch into larvae in about three days, and begin to eat micro-organisms and protozoa growing in water.

Male mosquitoes only suck grass juice and live on nectar, not blood. Female mosquitoes have to feed on blood (human or animal blood) eggs after mating to develop and mature, so only female mosquitoes can spread diseases. Female mosquitoes can lay eggs once after full blood, and they can lay eggs six to eight times in their lives, with 200 to 300 eggs each time. So killing a mosquito early is equivalent to killing hundreds of mosquitoes.

Mosquito control in summer

1, screen out the mosquitoes. Before mosquitoes wreak havoc, you must install a screen door with good sealing at home and close the screen door behind you to prevent mosquitoes from entering the room.

2. Clean up the accumulated water in the toilet in time, especially cover the toilet lid every time you go to the toilet. Clean the floor drain regularly to ensure its hygiene and no odor, especially the hair and other sundries accumulated in it during bathing. When not in use, you can cover it with a foam block of the right size.

3, the kitchen pool should be cleaned frequently, no water. It is best to use a dustbin with a lid. Try not to leave the kitchen waste for too long, and clean it up in time. Leftovers, etc. You can put it in a small bag and put it in the trash can.

Mosquitoes generally appear in April every year and reach the peak in the middle and late August. When the climate gets cold in autumn and the temperature drops below 10℃, mosquitoes will stop breeding and die in large numbers, and few mosquitoes survive. They can shelter from the wind and cold in places such as cracks in the wall, such as hiding in warmer and more hidden places indoors, such as behind the wardrobe. But it will avoid hot places, such as heating. This can not only avoid the severe winter, but also reduce the metabolic rate and avoid starvation. Kind of like hibernation. Outside, mosquitoes usually hide in warm places such as heating pipes, and the mosquitoes that appear in the second year are mostly hatched from eggs. ...

Summer is the breeding period of mosquitoes, and their average life span is not long, which is 3- 100 days for female mosquitoes and 10-20 days for male mosquitoes, but their reproduction is very fast, and they have to go through four parts: eggs, larvae, pupae and adults. Generally, eggs 1-2 days, larvae 5-7 days, pupae 2-3 days, adults.

The weather is sultry, and there are many mosquitoes before it rains, which is related to the living habits of mosquitoes. Insects such as mosquitoes have chemotaxis, that is, they have a certain tendency and avoidance reaction to some chemicals with special smells. In addition, mosquitoes also like to move in dark and humid places. With the tentacles of eyes and head and three pairs of sensitive sensors on feet, it can receive warm and humid smells, exhaled carbon dioxide, evaporated sweat and other secretions as "smell language".

Before the hot weather or rain, the humidity in the air is high and the light is weak, so the substances secreted by human skin can not be quickly volatilized due to the hot weather. These conditions have a trapping effect on mosquitoes and can be smelled in the wind. So before it rains, when the weather is hot, people feel that there are a lot of mosquitoes.