[Objective] Effects of bird damage on different millet varieties were re- searched to reduce the bird damage on millet. [Method] Panicle weight, panicle length, panicle diameter, 1 000-grain weight, blighted grain rate of 8 millet varieties were measured. The effect of early harvest on grouting was studied, and the grain total loss and the net cost were compared. [Result] The cost of frame net was much higher than the loss of bird damage at normal harvest without frame net. Re- duction of millet output caused by early harvest was higher than the loss of bird damage on millet at normal harvest without frame net. [Conclusion] Summer-sowing millet can not be harvested earlier than September 1. It can effectively prevent the bird damage and reduce the cost of prevention by adjusting sowing date, harvest time and spatial isolation of different millet varieties.
