Flies are completely abnormal insects, and their life history can be divided into several periods: eggs, larvae, pre-pupae, pupae and adults. Although the life span of flies is only about 1 month, they are very fertile. The life course of flies is calculated in days. Egg stage is about 1 day, larval stage is 3-6 days, and pupal stage is 3-7 days. It only takes 7- 14 days from egg development to adult. Adults begin to move and eat 2 to 24 hours after molting, and can mate and lay eggs normally after feeding.
Flies can mate at 65438+ 0 ~ 2 days after emergence. Flies have the physiological characteristics that they can lay eggs for life once they mate. A female fly can lay eggs 5 ~ 6 times in her life, and the amount of eggs laid each time is about 100 ~ 150, up to 300 at most. She can reproduce 10 to 12 generations a year, and her reproductive ability is amazing.
Activity characteristics of flies:
1. Flies are diurnal insects with obvious phototaxis. At night, it stays still. The activity and habitat depend on the species, season, temperature and region of flies. In some seasons, stable rot flies, summer toilet flies and city flies also invade houses. Chrysomya megacephala, Lucilia sericata, Calliphora, Bactrocera dorsalis, Hemp Fly, etc. Mainly active outdoors.
2. The activity of flies is greatly influenced by temperature. It can only crawl at 4-7℃, fly at 10- 15℃, feed, mate and lay eggs above 20℃, especially active at 30-35℃, stop moving at 35-40℃ due to overheating, and die at 45-47℃.
3. flies are good at flying. The flight speed can reach 6-8km/ h, and the maximum flight time is 8- 18km/ day and night. However, they usually move within the radius of 100 to 200m, and most of them do not exceed 1 to 2km.