The UN Environment-Global Environment Facility project, Removing Barriers to Invasive Species Management in Production and Protection Forests in SE Asia, which was active in Cambodia, Indonesia, the Philippines and Vietnam, produced this Guide. This Guide will serve as an aid in the identification, mapping, monitoring, and management of IAS that are already present in ASEAN member states, or which may become problematic in the future, due to increased trade and travel, economic development and climate change.