Abstract: The activity of adult Apriona germari included two stages:the feeding stage which was on the twigs of the host tree in the day time and the reproduction stage in the night time.An adult female could lay 23～234 eggs,130.3 eggs in average during its life,about 1.6 eggs per day.After the females had mated,they still could lay 9～176 inseminated eggs,89.7 eggs in average continuously without mating again.The adults (about 49.4% of the total)liked to feed on twigs towards northwest and 75% of the adults could be found on the twigs 1.1～2.0 m above the ground.