The apple leafminer moth, Phyllonorycter ringoniella Matsumura is known an important insect pest of apple. This study was conducted from 1992 to 2017 in the major apple producing districts in Gyeongbuk area including 4~6 cities (18~30 orchards), and examined the occurrence and damaged leaf (%) of leafminer at monthly interval in “Fuji” apple orchards. The damaged leaf was the highest in 1992 (5%), the gradually decreased until 2004, After damage rate was again increased until 2008, after which it decreased. Leaf damage was not significant between rootstocks including seedling rootstock, M.9, and M.26.

• Jiwon Kim(Apple Research Institution, National Institute of Horticultural & Herbal Science, RDA)
• Se Jin Kim(Apple Research Institution, National Institute of Horticultural & Herbal Science, RDA)
• Dong-Hyuk Lee(Apple Research Institution, National Institute of Horticultural & Herbal Science, RDA)
• Jong-Chul Nam(Apple Research Institution, National Institute of Horticultural & Herbal Science, RDA)
• Wonsu Cheon(Apple Research Institution, National Institute of Horticultural & Herbal Science, RDA)