The growth process of flies

Flies belong to typical complete metamorphosis insects in biology, belonging to Diptera of Insecta. They harm human beings by carrying a variety of pathogenic microorganisms. They are one of the four pests. They experience egg stage, larva stage, pupa stage and adult stage in their whole life. Let's take a look at the growth process of flies together.

egg stage

Fly eggs are milky white, banana or oval, about 1 mm long, there are two ridges on the back of the egg shell, the membrane between the ridges is the thinnest, the larvae emerge from here during incubation, the development time of egg stage is 8-24 hours, which is related to environmental temperature and humidity. The eggs do not develop below 13℃, and die below 8℃ or above 42℃. Humidity also affects the hatching rate of eggs. When the relative humidity is 75-80%, the hatching rate is the highest. When the relative humidity is lower than 65% or higher than 85%, The hatchability was significantly reduced.

larvae

Fly larvae commonly known as maggots, there are three instars, 1 instar larvae body length 1-3 mm, only after the valve. After molting, it becomes 2-year-old, 3-5 mm long, with prestigmata and poststigmata 2-lobed. It is 3 years old, 5-13 mm long, and 3-lobed after molting. The body color changes from transparent and milky white to milky yellow until mature and pupate. The 3rd instar larvae were long conical, pointed at the front end, truncated at the rear end, without eyes and feet. The life characteristics of maggots are that they like drilling, fear strong light, live in seclusion in the dark of breeding all day long, have multiple feeding habits, and all kinds of rotten and fermented organic matter are their delicacies.

pupal stage

Pupa is the third metamorphosis in the life history of flies. It is barrel-shaped, i.e. pupal. Its body color changes from pale to dark, and finally becomes chestnut brown. It is 5-8 mm long. The metamorphosis in the shell continues. Once the embryonic form of flies is formed, it enters the eclosion stage. When eclosion occurs, flies rely on the forehead sac of the head to alternately expand and contract, squeeze out the head end of the shell, and climb out through loose sand or other culture materials to reach the ground surface.

adult flies

Adult flies have a pair of large compound eyes, including about 4000 small eyes, sensitive vision, smell located on the antenna, taste organs mainly in the feet, favorable crawling to find food.