The morphological characteristics and life habit of a new pest hazard edible fungus Megaselia tamilnaduensis Disney were observed.Then,under natural conditions and 27 ℃ constant temperature,we reared and observed M. tamilnaduensis. Results showed that its female-male ratio was about 2. 57∶ 1. Under 27 ℃,7-10 segments of females abdomen stretched due to high environmental humidity and nutrient. The development time of a generation lasted 21-25 d. Among them,eggs lasted 1 d; larval stage lasted for 5-7 d; pup...