The larvae of flies are called maggots: understanding the characteristics and agricultural uses of fly maggots

The larvae of flies are collectively called maggots, also often written as fly maggots. A fly goes through four stages in its life: egg, larva, pupa and adult, and the maggot is the larval stage. In common fly species such as the house fly (Musca domestica) and the oriental latrine fly (Chrysomya megacephala), the larvae are mostly milky white or pale yellow maggots, with a conical body, a slightly pointed front end, no obvious head or legs, and an appearance very different from that of the adult.

Fly maggots like to live in droppings, rotting melons and fruits, animal remains and other putrid environments with a high water content, feeding on decaying organic matter. Because of their special feeding habits, fly maggots grow very quickly; under warm summer conditions, it often takes only a few days from egg hatching to larval maturity. Mature larvae leave the food source, burrow into nearby soft soil or substrate to pupate, and then emerge as adults.

In agriculture, fly maggots are a widely used insect protein resource; fly maggots raised artificially under standardised conditions can be processed into protein feed for poultry and fish. At the same time, fly maggots can quickly break down livestock and poultry manure and organic waste, and some farms use them to convert manure and sewage, turning waste into a usable resource, with the dual value of both treatment and utilisation.

It should be noted that fly maggots that breed naturally in wild garbage heaps and cesspits carry many kinds of pathogens and must not be caught at will for use as feed; fly maggots used for farming should be bred artificially in a controlled environment. In addition, fly maggots are easily confused with black soldier fly larvae; the two look similar but are different species. The black soldier fly belongs to the family Stratiomyidae and is also widely used in organic waste treatment, so the insect species should be clearly identified before use.