Analysis and Investigation and Control Measures of Lophodermium piceae in Xiaojin County

In this paper,investigation and analysis were made of Lophodermium piceae in Xiaojin county. The resintts showed that the occurrence of Lophodermium piceae was mainly affected by climate,management,stand age and other comprehensive factors. To prevent and control Lophodermium piceae,the methods of artificial tending, artificial tending plus smoking agent, thinning plus smoking agent,chemicals spraying and dusting were adopted respectively according to the characteristics and topography-physiognomy of artificial spruce forest regeneration.