Quarantine 37 seeks to reduce the risk of importing foreign plant diseases and insect pests by limiting the entry of plants to those necessary and by surrounding such entry as is permitted with the safeguards of (1) Freedom from soil, (2) Importation in safest form, (3) Inspection on entry, (4) Disinfection, (5) Field inspection, (6) Port inspection of baggage and freight. A list of important plant diseases intercepted during the years 1921 and 1922 is appended.