Why do fruits grow worms?

Drosophila is widely distributed in temperate and tropical climate zones all over the world. Because its staple food is yeast, and rotten fruit is easy to breed yeast, as long as many red-eyed flies are found near the trash can or on the fruit placed for a long time, they are fruit flies. Drosophila larvae are used to breeding in garbage dumps or rotten fruits. Therefore, fruits that are not kept in the refrigerator are particularly easy to attract fruit flies.

In addition to the north and south poles, at least 1000 species of fruit flies have been found. Drosophila melanogaster, produced in China and South China, mostly occurs in fruit stalls, kitchens and warehouses.

The 1 complete life cycle of Drosophila melanogaster can be divided into four distinct periods, namely, eggs → larvae → pupae → adults. Eggs are about 0. 5 mm long, white, with a contact line protruding from the back of the front end, which can be attached to the food or the bottle wall without being immersed in the food. The eggs hatch into larvae after 22-24 h, and the larvae molt twice to become third instar larvae, about 4-5 mm;

Visible to the naked eye, one end of it is slightly pointed like a head, with a black hook mouth on it. The larvae survived for about 4 days and pupated. At first, the color is light yellow and soft, then it gradually hardens into dark brown, and then it will emerge. Drosophila adults can mate 8 hours after emergence and lay eggs 2 days later. Drosophila adults generally survive for 37 days at 25℃.