How long does it take for flies to lay eggs on meat to form maggots?

1-3 days. It usually takes 1-3 days for flies to hatch into maggots after laying eggs on meat. This is because the morphology of maggots needs deeper changes. It takes 1-3 days for larvae to molt through the head, body segments and body walls for many times. If fly eggs are found on the meat, they should be cleaned up in time to avoid maggots hatching and breeding. At the same time, when storing meat food, we should pay attention to hygiene and pest control measures to avoid the invasion of pests such as flies.