How do flies form?

Flies are completely abnormal insects. When people mention flies, they will have a sense of disgust. Their life history can be divided into several stages, such as egg, larva, prepupa, pupa, adult, and so on. Although the lifespan is only about one month, their reproductive ability is amazing. The offspring of a pair of flies total about 190 million. Let's take a look at how flies are formed.

How do flies form?

The fly's life can be divided into four stages, that is, from the adult fly mating to spawning, through the egg → larva (maggot) → pupa → adult fly process, this process only takes about 10 days, and can be shortened when the temperature is high. Moreover, a fly can lay eggs for life after one mating. A female fly can lay eggs 5-6 times in a lifetime, with 100-150 eggs each time. Ten days later, these 100-odd eggs will become adult flies, so a fly can reproduce thousands of flies in a lifetime. Spring is the peak period for the reproduction of the first generation of adult flies, killing one fly in spring is equal to wiping out tens of thousands of flies in summer.

The life cycle of flies

1. Egg stage: the egg of the fly is milky white, banana-shaped or oval, about 1 mm long. there are two ridges on the back of the eggshell, and the membrane between the ridges is the thinnest, from which the larvae emerge during hatching. the development time of the egg stage is 824 hours, which is related to the ambient temperature and humidity.

2. Larvae: fly larvae usually have three instar stages, and the first instar larvae are 1mm long and have only posterior valves. After molting, it becomes 2 years old, with a length of 3 to 5 mm, with a front valve and a posterior valve with 2 cracks. The second molting is 3 years old, 5-13 mm long, and the posterior valve is 3-lobed.

3. Pupa stage: the pupa is the third metamorphosis in the fly's life history, in the shape of a bucket, the body color changes from light to dark, and finally changes to chestnut brown, with a length of 5mm to 8mm. Metamorphosis continues in the pupa shell. Once the embryonic form of the fly is formed, it enters the Eclosion stage.

4. Adult fly: the head of adult fly has a pair of large compound eyes, including about 4000 small eyes, the vision is sensitive, the sense of smell is on the antennae, and the taste organs are mainly in the feet. Mating can be carried out within 1-2 days after Eclosion, and a small pile of eggs can be produced a few days after mating.

The way to kill flies

1. Environmental management: in order to eliminate flies, we must control the breeding places, do a good job of hygiene inside and outside the livestock barn, keep livestock and poultry in bulk, and timely eliminate the accumulation of manure in the storage tank, do harmless treatment, do not dump animal dung casually, and strictly manage it. Flies must not be allowed to breed.

2. Eliminate maggots: maggots are larvae of flies. The easiest way to kill maggots is to spray them regularly with 1% trichlorfon solution. The method of hot killing is also very effective, that is, cover the animal manure with very hot bran ash, but close it tightly, which can suffocate the maggots in the dung tank.

3. Eliminate fly pupae: a small ditch can be dug around the breeding ground, maggots can fall into the water and drown when they crawl out after pupation, and pupa can also be picked up and burned to death with a small wooden clip in the maggot breeding place, and then compacted with lime and water, so as to avoid pupation into flies and eliminate later trouble.

4. Eliminate flies: the more suitable method is to use sticky fly paper or 2% trichlorfon to be trapped and killed in sweetened rice or rotten fish and vegetables, to keep moist and enhance the toxic effect, but not to directly expose to the sun or rain. Trichlorfon or phosphos can also be directly sprayed to kill flies.