This research reviews six potentially dangerous plant pathogens that could threaten trees and plants in Korea if introduced from other countries. These microscopic organisms can cause devastating diseases in trees, particularly in forest ecosystems. The research is important for protecting Korea’s valuable forest resources and preventing economic losses in agriculture and forestry industries. Impacts on everyday life: – Helps protect forests that provide recreation areas and clean air for communities – Safeguards timber resources used in construction and manufacturing – Preserves trees that prevent soil erosion and maintain ecosystem balance – Protects ornamental plants used in urban landscaping – Supports international trade by identifying risks and establishing safety measures