Tropical spider moths, a long-distance migratory pest originally from the Americas, are expected to cause damage to rice crops in Korea, including corn and sorghum, starting mid-May due to westerly winds. The pest, which was first confirmed in Korea in 2019 and has spread from the Americas to Africa and Southeast Asia, causes significant damage by caterpillars that eat leaves, stems, and ears. In 2021, Jeollabuk-do in Korea experienced damage to corn fields from these moths. The agricultural research services have found that controlling the moths within 7 to 16 days of adult flight has high efficiency. Pheromone traps are being used to monitor the moths, and investigations are focused on corn fields.