Mass mortality of oak trees has been reported at Sungnam city, Gyeonggi province, Korea in 2004, and spread to several areas of Korean peninsula. It seemed to be occurred by a possible pathogenic fungus Raffaelea sp. spread by an ambrosia beetle, Platypus koryoensis (Coleoptera: Platypodidae). P. koryoensis massively attacked healthy or stressed living Quercus mongolica. The numbers of damaged or died Q. mongolica by oak wilt disease has increased annually since its first report. Here, we introduce control methods recently developed for the control of this disease.

• Il-Kwon Park(Division of Forest Insect Pests and Diseases, Korea Forest Research Institute)