Here, we provided a lucid key for twelve lepidopteran quarantine pests in South Korea. They were selected based on border quarantine inspection data from 1996 to 2016 in S. Korea. They are belonging to eight families: Carposinidae, Crambidae, Pyralidae, Gelechiidae, Oecophoridae, Tineidae, Tortricidae and Geometridae, and also categorized into the three groups: prohibited, regulated and nonquarantine pests. The key includes diagnostic characters from head, thorax, fore- and hind-wings for each species examined.

• Sora Kim(Research Institute of Agriculture and life Sciences, Seoul National University, Korea)
• Lauri Kaila(Finnish Museum of Natural History, Zoology Unit, University of Helsinki, Helsinki FI-00014, Finland)
• Wonhoon Lee(Department of Plant Medicine and Institute of Agriculture & Life Science, Gyeongsang National University, Korea)
• Seunghwan Lee(Research Institute of Agriculture and life Sciences, Seoul National University, Korea)